[pvr.mythtv] Initial release 1.9.15

First release of new addon 'pvr.mythtv' is out.
It is the successor of addon 'pvr.mythtv.cmyth' and it is intented to
replace it with the release of MythTV 0.28.

It is based on the new library 'cppmyth' and inter-operate with the new API services provided by MythTV 0.27 and future.  The project 'cppmyth' includes C sources of jansson 2.6.

Regards