Update README.md

Added syntastic
Updated plugins
Merge branch 'master' of github.com:amix/vimrc
Merge remote-tracking branch 'upstream/master'

* upstream/master:
  Updated plugins
  Update README.md

Conflicts:
	sources_non_forked/goyo.vim/plugin/goyo.vim
	sources_non_forked/vim-golang/autoload/go/complete.vim
	sources_non_forked/vim-golang/ftplugin/go.vim
	sources_non_forked/vim-golang/indent/go.vim
	sources_non_forked/vim-golang/readme.txt