Merge branch 'stable-2.15'

* stable-2.15:
  Add bin/ to .gitignore
  Remove unused imports
  Remove unused imports

Change-Id: If16136224fea2f41ad1c1c3437e1f7c9a7eba677
tree: f1ff09afbee1e892a256332f522e64ff724ad7f3
  1. .gitignore
  2. .settings/
  3. BUILD
  4. LICENSE
  5. src/