vimrc: rely on vim-gtk2 not vim-gnome

having both installed and in here
was causing the wrong settings to be
used.
remove vim-sparkup (no longer found at that URL)
vimrc: format go code with appropriate tabs/indent
vimrc: unite/fastrAck changes

don't use no-quit for UniteWithCursorWord
don't use fastrAck.sh (used for debugging)