[LIBHBASE]: Initial version of the public headers.
[LIBHBASE]: Adding Java/JNI Proxy Classes.
[LIBHBASE]: Adding JNI implementation.
[LIBHBASE]: Simple performance test.
[LIBHBASE]: Adding example code for asynchronous APIs.
[LIBHBASE]: Gradle build automation added (Joseph Fota, Patrick Wong, Aditya Kishore).
[LIBHBASE]: Integrating with maven build and updating protobuf dependency to 2.5.0.

* Added dependency on AsyncHBase 1.5.0-libhbase-SNAPSHOT.
* Updating Protobuf to 2.5.0 as AsyncHBase 1.5.0 requires it.
* Gradle build is currently enabled only on Linux.
[LIBHBASE]: Updating slf4j version to 1.7.5.