Added git commit spell check, current line highlighting, turned off show command
cleaned up whitespace. reset difftool to vimdiff. removed mergetool
set vimdiff as mergetool
added background flag to vim command
turned showmode on again and setup homegrown status line
added path to vim/bundle to ignore list. tidier
Commented out homegrown status line, added Ruby file types.

Added several additional file types to Ruby list.

Commented out homegrown status line as it appears vim-airline is working now.
changes to vim-airline to get it working.