GitGutter: add path to git to overcome recent problems

problems possibly related to setting Fish to default shell
either way, it works with the /usr/local/bin/git path
default MarkdownPreview settings
Merge branch 'master' of git://github.com/phette23/sublime-text-3-settings

* 'master' of git://github.com/phette23/sublime-text-3-settings:
  two handy copy-paste build tools
  install URLEncode package
  install Freemarker package
  packages: scss-lint renamed to contrib-scss-lint
install VimL package
Merge branch 'master' of git://github.com/phette23/sublime-text-3-settings

* 'master' of git://github.com/phette23/sublime-text-3-settings:
  install VimL package