add script for renaming long names into shorter ones

The primary benefit is that this keeps the name column shorter and
therefore closer to the channel column. Another benefit is that the
shorter name is more likely to turn up as-is in text, leading to
improved colorization.
add open source licences to source files
add a LICENSE file
move comment closer to the thing it commets
add comment to potentially support clientspam
comment for possibly doing save-state and load-state on colors
add simplefilter to help summarise info and reduce scroll rate
Merge branch 'master' of github.com:aliclark/irctail