add_bundle: extra args are passed to 'git submodule add'
Add the muzzl.vim bundle
Only load the muzzl colorscheme if the plugin is installed
Not quite ready to make muzzl the default colorscheme, need to testdrive it a bit first
Add the Recover.vim bundle to the following profiles: common
Add the vim-niceblock bundle to the following profiles: common
Add support for add_bundle.sh to install to profiles as well