Offline access

[AeroCross]

Thank you (and anyone who has contributed to this plugin, too) for such a magnificent plugin. It's saving lives, I tell you.

This isn't an issue — it's more of a feature suggestion.

I was wondering if there's any change to add offline access of some sort. Since gists need internet connection, it could be useful if the snipped is saved elsewhere — if there's access, check and update if necesary, but if there's not, just use the cached version.

[condemil]

Merged with issue #79.