[Maemo Mapper] Maemo Mapper v2.1 Released

This release adds the beginnings of a DBUS interface. There is only one method right now, set_view_center, which allows an application to set the latitude, longitude, and zoom level of Maemo Mapper's view. This could be used, for example, to allow a third-party application to focus your view on a particular point of interest. More DBUS methods will come in future versions of Maemo Mapper. See the dbus-ifc.h file for details about the DBUS interface. Also, I've made many changes under the hood in the communication with a GPS receiver. GPS communication is now entirely handled via GPSD, which should hopefully make the connection more stable and flexible. It should solve some of the "connects for a few seconds, then hangs" issues, and it also lays the groundwork for support for the N810's internal GPS receiver. There is still no official N810 release of Maemo Mapper, but if you happen to be using Maemo Mapper on an N810, try using the "File Path" receiver type and entering "/dev/pgps" as the path.