Merge branch stable-2.12

* stable-2.12:
  Adapt to the JGit v4.5.x

Change-Id: I45ca07a7bc98d3d8acb2d8af0516a42eef90e845
tree: d83b99052ca64cb99e349262b9f396a7df6ece3d
  1. .gitignore
  2. .settings/
  3. BUCK
  4. LICENSE
  5. src/