Compatibility fix for Python 3.3

Fix missing data file after 1.4 release

Word diff; theme; options changes; drop python 2 support

Demo diff for making screenshots

Drop context diff support; wide chars; SIGPIPE; python 2.6+

Support perforce, pager, Windows; Fix stdin, tab fix; perf improvement

Rename to ydiff

Add env varirable CDIFF_OPTIONS to hold default options

More robust parser to tolerate evil unified diff

Diff of diff; solarized color