channelspecific example CM: add all the Channel properties from spec <= 0.17.13
channelspecific example CM: add all the Channel properties from spec <= 0.17.13

Also use G_PARAM_STATIC_STRINGS

Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib