Update and remove vim-rails.
Updated all submodules and removed vim-rails submodules (never used).
	modified:   .gitmodules
	modified:   bundle/clang_complete
	modified:   bundle/ctrlp.vim
	modified:   bundle/gist-vim
	modified:   bundle/nerdtree
	modified:   bundle/syntastic
	modified:   bundle/vim-fugitive
	deleted:    bundle/vim-rails