Issue 137: fix Tutorial link is broken

change docs direction from main/java/com/twitter/distributedlog to main/java/org/apache/distributedlog"

Author: Jia Zhai <zhaijia03@gmail.com>

Reviewers: Sijie Guo <sijie@apache.org>

Closes #140 from zhaijack/issue_137
diff --git a/distributedlog-tutorials/distributedlog-messaging/messaging-3.md b/distributedlog-tutorials/distributedlog-messaging/messaging-3.md
index f728126..e155600 100644
--- a/distributedlog-tutorials/distributedlog-messaging/messaging-3.md
+++ b/distributedlog-tutorials/distributedlog-messaging/messaging-3.md
@@ -69,4 +69,4 @@
         }, 10, 10, TimeUnit.SECONDS);
     ```
 
-Check `distributedlog-tutorials/distributedlog-messaging/src/main/java/com/twitter/distributedlog/messaging/ReaderWithOffsets` for more details.
+Check `distributedlog-tutorials/distributedlog-messaging/src/main/java/org/apache/distributedlog/messaging/ReaderWithOffsets` for more details.
diff --git a/docs/tutorials/messaging-3.rst b/docs/tutorials/messaging-3.rst
index b7618e2..7629c4d 100644
--- a/docs/tutorials/messaging-3.rst
+++ b/docs/tutorials/messaging-3.rst
@@ -106,6 +106,6 @@
         }, 10, 10, TimeUnit.SECONDS);
 
 
-Check `distributedlog-tutorials/distributedlog-messaging/src/main/java/com/twitter/distributedlog/messaging/ReaderWithOffsets`_ for more details.
+Check `distributedlog-tutorials/distributedlog-messaging/src/main/java/org/apache/distributedlog/messaging/ReaderWithOffsets`_ for more details.
 
-.. _distributedlog-tutorials/distributedlog-messaging/src/main/java/com/twitter/distributedlog/messaging/ReaderWithOffsets: https://github.com/apache/incubator-distributedlog/blob/master/distributedlog-tutorials/distributedlog-messaging/src/main/java/com/twitter/distributedlog/messaging/ReaderWithOffsets.java
+.. _distributedlog-tutorials/distributedlog-messaging/src/main/java/org/apache/distributedlog/messaging/ReaderWithOffsets: https://github.com/apache/incubator-distributedlog/blob/master/distributedlog-tutorials/distributedlog-messaging/src/main/java/org/apache/distributedlog/messaging/ReaderWithOffsets.java
diff --git a/docs/tutorials/messaging-4.rst b/docs/tutorials/messaging-4.rst
index 7e585b2..82d7816 100644
--- a/docs/tutorials/messaging-4.rst
+++ b/docs/tutorials/messaging-4.rst
@@ -21,4 +21,4 @@
 
 This tutorial_ shows how to do `exact-once` processing.
 
-.. _tutorial: https://github.com/apache/incubator-distributedlog/blob/master/distributedlog-tutorials/distributedlog-messaging/src/main/java/com/twitter/distributedlog/messaging/StreamTransformer.java
+.. _tutorial: https://github.com/apache/incubator-distributedlog/blob/master/distributedlog-tutorials/distributedlog-messaging/src/main/java/org/apache/distributedlog/messaging/StreamTransformer.java
diff --git a/docs/tutorials/messaging-5.rst b/docs/tutorials/messaging-5.rst
index 12f4181..5d88509 100644
--- a/docs/tutorials/messaging-5.rst
+++ b/docs/tutorials/messaging-5.rst
@@ -15,5 +15,5 @@
 Check `KafkaDistributedLogProducer`_ for more details.
 
 .. _./distributedlog-tutorials/distributedlog-kafka: https://github.com/apache/incubator-distributedlog/tree/master/distributedlog-tutorials/distributedlog-kafka
-.. _KafkaDistributedLogProducer: https://github.com/apache/incubator-distributedlog/blob/master/distributedlog-tutorials/distributedlog-kafka/src/main/java/com/twitter/distributedlog/kafka/KafkaDistributedLogProducer.java
+.. _KafkaDistributedLogProducer: https://github.com/apache/incubator-distributedlog/blob/master/distributedlog-tutorials/distributedlog-kafka/src/main/java/org/apache/distributedlog/kafka/KafkaDistributedLogProducer.java
 
diff --git a/website/docs/0.4.0-incubating/tutorials/messaging-3.rst b/website/docs/0.4.0-incubating/tutorials/messaging-3.rst
index b7618e2..7629c4d 100644
--- a/website/docs/0.4.0-incubating/tutorials/messaging-3.rst
+++ b/website/docs/0.4.0-incubating/tutorials/messaging-3.rst
@@ -106,6 +106,6 @@
         }, 10, 10, TimeUnit.SECONDS);
 
 
-Check `distributedlog-tutorials/distributedlog-messaging/src/main/java/com/twitter/distributedlog/messaging/ReaderWithOffsets`_ for more details.
+Check `distributedlog-tutorials/distributedlog-messaging/src/main/java/org/apache/distributedlog/messaging/ReaderWithOffsets`_ for more details.
 
-.. _distributedlog-tutorials/distributedlog-messaging/src/main/java/com/twitter/distributedlog/messaging/ReaderWithOffsets: https://github.com/apache/incubator-distributedlog/blob/master/distributedlog-tutorials/distributedlog-messaging/src/main/java/com/twitter/distributedlog/messaging/ReaderWithOffsets.java
+.. _distributedlog-tutorials/distributedlog-messaging/src/main/java/org/apache/distributedlog/messaging/ReaderWithOffsets: https://github.com/apache/incubator-distributedlog/blob/master/distributedlog-tutorials/distributedlog-messaging/src/main/java/org/apache/distributedlog/messaging/ReaderWithOffsets.java
diff --git a/website/docs/0.4.0-incubating/tutorials/messaging-4.rst b/website/docs/0.4.0-incubating/tutorials/messaging-4.rst
index 7e585b2..82d7816 100644
--- a/website/docs/0.4.0-incubating/tutorials/messaging-4.rst
+++ b/website/docs/0.4.0-incubating/tutorials/messaging-4.rst
@@ -21,4 +21,4 @@
 
 This tutorial_ shows how to do `exact-once` processing.
 
-.. _tutorial: https://github.com/apache/incubator-distributedlog/blob/master/distributedlog-tutorials/distributedlog-messaging/src/main/java/com/twitter/distributedlog/messaging/StreamTransformer.java
+.. _tutorial: https://github.com/apache/incubator-distributedlog/blob/master/distributedlog-tutorials/distributedlog-messaging/src/main/java/org/apache/distributedlog/messaging/StreamTransformer.java
diff --git a/website/docs/0.4.0-incubating/tutorials/messaging-5.rst b/website/docs/0.4.0-incubating/tutorials/messaging-5.rst
index 12f4181..5d88509 100644
--- a/website/docs/0.4.0-incubating/tutorials/messaging-5.rst
+++ b/website/docs/0.4.0-incubating/tutorials/messaging-5.rst
@@ -15,5 +15,5 @@
 Check `KafkaDistributedLogProducer`_ for more details.
 
 .. _./distributedlog-tutorials/distributedlog-kafka: https://github.com/apache/incubator-distributedlog/tree/master/distributedlog-tutorials/distributedlog-kafka
-.. _KafkaDistributedLogProducer: https://github.com/apache/incubator-distributedlog/blob/master/distributedlog-tutorials/distributedlog-kafka/src/main/java/com/twitter/distributedlog/kafka/KafkaDistributedLogProducer.java
+.. _KafkaDistributedLogProducer: https://github.com/apache/incubator-distributedlog/blob/master/distributedlog-tutorials/distributedlog-kafka/src/main/java/org/apache/distributedlog/kafka/KafkaDistributedLogProducer.java