[SVN] r2737 (CVS)

[Brian Donovan]

Refactored diff commands to use cvs_diff, which uses versioned_file. At the end of each diff output using the progress dialog I got a 'nil', which I found out was because of a line in progress.rb. I changed it to output the result only if there is one. If this breaks anyone else's code then we can find some other solution.

Changed:
U   trunk/Bundles/CVS.tmbundle/Commands/Diff With Newest (HEAD).plist
U   trunk/Bundles/CVS.tmbundle/Commands/Diff With Previous Revision (PREV).plist
U   trunk/Bundles/CVS.tmbundle/Commands/Diff With Revision....plist
U   trunk/Bundles/CVS.tmbundle/Commands/Diff With Working Copy (BASE).plist
A   trunk/Bundles/CVS.tmbundle/Support/
A   trunk/Bundles/CVS.tmbundle/Support/cvs_diff.rb
A   trunk/Bundles/CVS.tmbundle/Support/versioned_file.rb
U   trunk/Support/lib/progress.rb