CREDITS: Update my nick, change spacing

Changes my nickname to lyska.

Fixes a minor pet peeve on /INFO and accurately shows #rainbow-factory
as the channel for elemental-ircd.

Add my nickname to list of people to ask on IRC in `README.md`
Merge pull request #33 from lyska/fix-my-name

CREDITS: Update contributor nick, change spacing, update URLs
readme: oxford comma...