Merge pull request #3 from larsborn/master

Cygwin Windows support
Update README.textile
Update README.textile
Update README.textile
Create tb2taskwarrior_tasknote

This is a working, salvaged, custom button script that seemed to be missing.
Added 'missing' files for increased functionality
tb2taskwarrior with taskmail requires a modified custom button script
and taskmail.
Merge pull request #4 from mahern/master

Readme changes
merged.