Add an output_strip kwarg to Git.execute

[znerol]

Strip the last line of the output if it is empty (default). Stripping should be disabled whenever it is important that the output is not modified in any way. For example when retrieving patch files using git-diff.

[Byron]

Thanks for the fix.
One last question though - are you sure you want it to be in master ? After all, master is still experimental, and the only version I would endorse for production purposes is 0.3 (in the respective branch).

[znerol]

It certainly would be nice to have that in 0.3. You should be able to git cherry-pick 0e90a8f.