* master:
  Update README.md
  modify code style
  modify code style
  modify test case
  modify mongodb
  modify MongoDBMethodInterceptorTest
  Add a flag to determine whether to bind data
  fix bugs
  Support plugin for MongoDB

Update README.md

Support plugin for MongoDB

* master:
  fix collector cannot start issue
  Fix ci-fail.
  Add “checkStyle.xml” and “codeStyle.xml” files, varify the code-style when “mvn compile” and CI. This is the initialized commit.
  Update LICENSE
  Update LICENSE

# Conflicts:
#	skywalking-collector/skywalking-collector-worker/src/main/java/com/a/eye/skywalking/collector/worker/config/EsConfig.java

Response for "Add checkstyle", close #149 

fix collector cannot start issue

Add “checkStyle.xml” and “codeStyle.xml” files, varify the code-style when “mvn compile” and CI. This is the initialized commit.

fix start error issue

Going to adjust some comments after merge.

* add comments class in selector package

* actor comments

* 1. comments of collector config
2. index creator support options: overwrite, ignore, off

* fix index testcase bug

* fix comments

* change the config of index creat to index initialize model

* test case failure