Changed to show full name of current file when choosing file for comparison
enhance utility script with extra useful functions
use util script instead of reinventing wheel,
separate extensions with spaces instead of line breaks to be more compatible with GProject plugin
use util script
grab diff output directly instead of using temp file,
this reduces noise in temp directory and lets us specify a better filename
convert diff viewer list to drop-down instead of radio buttons
move hackish dialog extender into utility script
add support for 'c' (replace text) and 'C' (replace line) commands
add 'gg' (start of file) command
Merge pull request #3 from ThrawnCA/master

Refinements to comparison scripts