Improve #35 Added the "Build Package" section (#36)

* Added the "Build Package" section

* Fixed the typo and moved the "Build" section to the "Install"

Fixed the typo and moved the "Build" section to the "Install"

Author: g-ericso

README.md

@@ -16,13 +16,17 @@ It achieves this by
 The main documents for consuming Endpoints can be found at
 https://cloud.google.com/endpoints/docs/frameworks/java
 
+## Build package
+
+    git submodule init && git pull --recurse-submodules=yes
+    ./gradlew build
+
 ## Installing to local maven
 
 To install test versions to Maven for easier dependency management, simply run:
 
     gradle install
-
-
+    
 Java Versions
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