Merge pull request #13 from special/sqlite-backend

Port to libcommhistory 1.6.0
[commhistory-daemon] Replace notification context properties with a DBus interface

These properties are only ever used by the messaging and voicecall UIs
to indicate when inboxes/callhistory/conversations are observed, to
clear notifications. That doesn't require the use of contextkit or
statefs.

Instead, use the existing commhistory service and have clients call
methods on that directly.
[commhistory-daemon] Rename com.nokia.CommHistory dbus service to org.nemomobile.CommHistory
Parse dbus setObservedConversations arguments correctly