Vim: add Ragel syntax highlighting

Signed-off-by: Wincent Colaiuta <win@wincent.com>
Use git:// protocol URLs consistently for submodules

Git doesn't always have HTTP support compiled in, and you shouldn't have
to authenticate with GitHub in order to clone these open source repos.

Signed-off-by: Wincent Colaiuta <win@wincent.com>
Ignore untracked files in vim-ragel submodule

This ignores the tags file that gets created in the submodule directory.

Signed-off-by: Wincent Colaiuta <win@wincent.com>