Add export where required

Conflicts:
	zsh/.zshrc
Add vim-ember-script and vim-emblem to vim bundles
Update submodules
Remove RUBY_FREE_MIN environment variable
Downgrade github-issues.vim to a version that is compatible to older vim

Newer github-issues.vim versions use noswapfile edit, which is
introduced in vim version 7.4.399.
Merge remote-tracking branch 'mbreit/master'

Conflicts:
	zsh/.zshrc