Merge branch stable-2.15

* stable-2.15:
  Adapt to the JGit v4.5.x

Change-Id: Ibc0c05aa163f8ef3668e6c043bf9076974c96a3a
tree: f3f01aff794a2a8fefec7830b215719312813f68
  1. .gitignore
  2. .settings/
  3. BUILD
  4. LICENSE
  5. src/