Fix link to CLI and add API host tip.
Fix link to db README.

Remove deadcode.

Move gradle helper to gradle directory and update all path.
diff --git a/tools/cli/build.gradle b/tools/cli/build.gradle
index 6a229b0..a629b6f 100644
--- a/tools/cli/build.gradle
+++ b/tools/cli/build.gradle
@@ -7,7 +7,7 @@
 }
 
 ext.dockerImageName = 'whisk/cli'
-apply from: '../../docker.gradle'
+apply from: '../../gradle/docker.gradle'
 
 task clean(type: Delete) {
     delete 'build'