Fix candy-chat/candy#204 - xhtml colors
Fix initial color setting (without cookie)
Update readme with list of plugins
Escape message (related: candy-chat/candy#f93cefb)
Fix inline-images in combination with colors-xhtml

Reduce mem overhead by moving regex out of the event handler
Merge branch 'feature/xhtml-colors' into dev

Colors XHTML plugin for candy-chat/candy#204