[PATCH] mergetools: implemented new mergetool file for ExamDiff

Thanks for the hint. I used the other examples to fix the implementation of the 
ExamDiff mergetool. I've tested the Winmerge and ExamDiff mergetools with both
`git difftool` and `git mergetool` and both seem to work as expected. I've 
combined all my changes into one patch. Are there any other issues with my
changes?

Jacob Nisnevich (1):
  mergetools: implemented new mergetool file for ExamDiff

 mergetools/examdiff           | 20 ++++++++++++++++++++
 mergetools/mergetools_helpers | 24 ++++++++++++++++++++++++
 mergetools/winmerge           | 23 +++--------------------
 3 files changed, 47 insertions(+), 20 deletions(-)
 create mode 100644 mergetools/examdiff
 create mode 100644 mergetools/mergetools_helpers

-- 
1.9.1