Use recent speaker instead of alphabetical nick tab complete

Use _ for sorting.

Fix jshint problems and naming things.

Fix comments
Remove the old and now unused flat nicklist
Try to improve the readme
Fix a few things in the README

@torhve, please cherry-pick onto your PR :)
Merge pull request #269 from torhve/readme

Improve the readme
Merge pull request #267 from torhve/recentspeaker

Use recent speaker instead of alphabetical nick tab complete