[Github] update the lastest commit of submodule

Update the lastest commit of submodule

cd framework
git checkout master
git pull
git submodule update --init --recursive

add git alias for update the lastest commit of submodule

git config --global alias.up-sub-snipmate-snippets '!f() { cd bundle/snipmate-snippets && git checkout master && git pull && git submodule update --init --recursive; }; f'

Reference:

• Easier way to update submodules in git
• How do I alias commands in git?