Updates to work with Accumulo 2.0.0-alpha-1 (#6)

diff --git a/Dockerfile b/Dockerfile
index 8066d56..98bba83 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -25,7 +25,7 @@
 ENV HADOOP_VERSION ${HADOOP_VERSION:-3.1.1}
 ENV HADOOP_USER_NAME ${HADOOP_USER_NAME:-accumulo}
 ENV ZOOKEEPER_VERSION ${ZOOKEEPER_VERSION:-3.4.13}
-ENV ACCUMULO_VERSION 2.0.0-SNAPSHOT
+ENV ACCUMULO_VERSION 2.0.0-alpha-1
 
 ENV APACHE_DIST_URLS \
   https://www.apache.org/dyn/closer.cgi?action=download&filename= \
@@ -49,17 +49,14 @@
     [ -n "$success" ]; \
   }; \
   \
-  #download "accumulo.tar.gz" "accumulo/$ACCUMULO_VERSION/accumulo-$ACCUMULO_VERSION-bin.tar.gz" \
+  download "accumulo.tar.gz" "accumulo/$ACCUMULO_VERSION/accumulo-$ACCUMULO_VERSION-bin.tar.gz"; \
   download "hadoop.tar.gz" "hadoop/core/hadoop-$HADOOP_VERSION/hadoop-$HADOOP_VERSION.tar.gz"; \
   download "zookeeper.tar.gz" "zookeeper/zookeeper-$ZOOKEEPER_VERSION/zookeeper-$ZOOKEEPER_VERSION.tar.gz"
 
-#RUN tar xzf accumulo.tar.gz -C /tmp/
+RUN tar xzf accumulo.tar.gz -C /tmp/
 RUN tar xzf hadoop.tar.gz -C /tmp/
 RUN tar xzf zookeeper.tar.gz -C /tmp/
 
-# Comment out accumulo-related lines above and remove line below when 2.0.0 is released
-ADD ./accumulo-$ACCUMULO_VERSION-bin.tar.gz /tmp/
-
 RUN mv /tmp/hadoop-$HADOOP_VERSION /opt/hadoop
 RUN mv /tmp/zookeeper-$ZOOKEEPER_VERSION /opt/zookeeper
 RUN mv /tmp/accumulo-$ACCUMULO_VERSION /opt/accumulo
diff --git a/README.md b/README.md
index 28bc23f..bdd67aa 100644
--- a/README.md
+++ b/README.md
@@ -14,11 +14,11 @@
 
 While it is easier to pull from DockerHub, the image will default to the software versions below:
 
-| Software    | Version        |
-|-------------|----------------|
-| [Accumulo]  | 2.0.0-SNAPSHOT |
-| [Hadoop]    | 2.7.4          |
-| [Zookeeper] | 3.4.9          |
+| Software    | Version       |
+|-------------|---------------|
+| [Accumulo]  | 2.0.0-alpha-1 |
+| [Hadoop]    | 2.7.4         |
+| [Zookeeper] | 3.4.9         |
 
 If these versions do not match what is running on your cluster, you should consider building
 your own image with matching versions. However, Accumulo must be 2.0.0+. Below are instructions for
@@ -28,15 +28,7 @@
 
         git clone git@github.com:apache/accumulo-docker.git
 
-2. Until Accumulo 2.0.0 is released, build a Accumulo tarball distribution and copy it to the root
-   directory of the repo.
-
-        git clone git@github.com:apache/accumulo.git
-        cd accumulo/
-        mvn clean package
-        cp assemble/target/accumulo-2.0.0-SNAPSHOT-bin.tar.gz /path/to/accumulo-docker/
-
-3. Build the default Accumulo docker image using the command below.
+2. Build the default Accumulo docker image using the command below.
 
         cd /path/to/accumulo-docker
         docker build -t accumulo .