Fix assmbly for mvn clean install -Papache-release and update version to SNAPSHOT for SNAPSHOT release.

Fix javadoc for preparing for our first ASF release.

Fixing javadoc. And try to trigger a ci fail in this commit, in order to make sure javadoc will be checked in further pull request.

[Agent] fix HierarchyMatch donot support generic type

[Agent] fix the servicecomb-1.x-plugin build failure in local workdir

Add [Agent] V1 servicecomb  plugin

Adjust build guide document.

Fix format in cn

Fix format

UI has already included in main repo.

UI has already included in main repo.

Add links to resources catalog

Update submodule.

Using submodule to link protocol and UI

Update assembly.xml

fixed maven 3.3.9 build issue caused by empty assembly ID on Ubuntu 16.04.2 using OpenJDK 1.8.0_151.

[INFO] Building apm-collector-boot 5.0.0-alpha
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ apm-collector-boot ---
[INFO] Deleting /home/steve/skywalking/incubator-skywalking/apm-collector/apm-collector-boot/target
[INFO] 
[INFO] --- maven-checkstyle-plugin:2.17:check (validate) @ apm-collector-boot ---
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.492 s
[INFO] Finished at: 2018-02-18T12:05:49-06:00
[INFO] Final Memory: 19M/235M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-checkstyle-plugin:2.17:check (validate) on project apm-collector-boot: Failed during checkstyle configuration: cannot initialize module Header - Unable to find: CHECKSTYLE_HEAD -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException

Change the data type of sla and apdex attributes from Float to Int.

Update logback version in application logback toolkit

Agent data aggregate test.