Remove ruby from filetypes for automatical trailing whitespace removal

Add normal mode mapping to remove whitespace on demand.
Merge branch 'master' of github.com:rjkaes/vimfiles
Merge branch 'master' of github.com:rjkaes/vimfiles
Merge branch 'master' of github.com:rjkaes/vimfiles
Merge branch 'master' of github.com:rjkaes/vimfiles
Upgrade pathogen.vim to 2.2.