TODO: new proposal for a '--check-version' option.

Author: jmnavarrol

TODO.md

@@ -8,5 +8,6 @@ Pending actions, general notes, etc. (in no particular order):
 * [#10](../../issues/10): Review [vag](https://github.com/charlyoleg2/vag) and [vcstool](https://github.com/dirk-thomas/vcstool) for inspiration.
 * Refactor multigit so it can be used in library mode by other applications.
 * Find the way to simplify subrepos' format allowing for *gitref* instead of *branch|tag|commit* (the code should find what kind of object *gitref* references).
+* Add a `--check-version` option (or something like that) that looks for updates.
 
 ## IN PROGRESS