TpBaseClient introspectability

Submitted by Simon McVittie

Assigned to Telepathy bugs list

Link to original bug (#27886)

Description

+++ This bug was initially created as a clone of Bug #25236 +++

I wrote:

We should also get this introspectable (do this as a separate branch) by putting it in the list of introspectable headers in introspect.am, and sanity-checking the .gir output.

Version: git master