Add number.txt to text swamp
Test that alternation works with -w
Enclose -w matches in a group

This allows the regex boundaries with work with other regex features
like alternation
Update Changelog
Add a completion script generator
Ignore generated completion scripts
Add more notes on what to consider when adding a new option
Specify which completion script to generate
Add Makefile rules for completion scripts
Update changelog to include completion scripts
Merge remote-tracking branch 'upstream/dev' into jonah
Added documentation on available colors from SO answer linked in #26