Per CQ 3559 "JGit - Eugene Myers O(ND) difference algorithm" we
have approval to check this into our master branch.
* cq-diff:
Add file content merge algorithm
Add performance tests for MyersDiff
Add javadoc comments, remove unused code, shift comments to correct place
Fixed MyersDiff to be able to handle more than 100k
Fix some warnings regarding unnecessary imports and accessing static methods
Add the "jgit diff" command
Prepare RawText for diff-index and diff-files
Add a test class for Myers' diff algorithm
Add Myers' algorithm to generate diff scripts
Add set to IntList