* Add XEP-0245: The /me Command to DOAP
Supported since f277db6
ref #12
* Add XEPs to DOAP based on xmpp-vala/src/module/xep
Don't know what the completion status are of these, so only adding the
XEP reference.
* Add XEP-0222 to DOAP, implied by OMEMO support
* Add XEP-0398 since doing nothing is valid
* Add XEP-0410 to DOAP file
based on existence of xmpp-vala/src/module/xep/0410_muc_self_ping.vala
The xmpp-doap extension has be simplified to only expose the
SupportedXep class and its children properties, as well as categories,
and reuses DOAP to the maximum.