Merge branch 'stable-2.11'

* stable-2.11:
  Add CommitValidationListener example
  Consume API version 2.11.4

Change-Id: I37fa123d5cf9121050537d7fb31801e8c7767b5c
tree: 21cbfd22eb179dc468cf70065555d3bcbf1272ca
  1. lib/
  2. src/
  3. .buckconfig
  4. .gitignore
  5. BUCK
  6. LICENSE
  7. pom.xml