HGKeeper

7e0ffe7001ed

Implement the TalkatuMessage interface with TalkatuInput, delete TalkatuDemoMessage, and change TalkatuAttachment's id from gint64 to guint64

Talkatu is versioned in [mercurial](https://www.mercurial-scm.org/) and is

available on [bitbucket](https://bitbucket.org/pidgin/talkatu).

All contributions are provided via pull requests to the bitbucket repository.