added syntax highlight for notification messages
pool notification messages in a cache
added notification display function
changed feedkeys mode for mapping a function
fixed missing ends
added map for calling display function
trigger autocmd for user custom actions when notified
added hook names for notification
check hook elements to avoid duplication
added tweetvim#hook#remove
reimplemented notification using tweetvim#hook
deleted unnecessary map for notification
rename
go back to previous feedkeys mode
Merge pull request #46 from tokoro10g/notification

Added event notification (Fav, Unfav, RT, Mention)