Fixed directory for inkscape executable. Now points to $(prefix)/bin/inkscape (bin added.)

Fixed service file! Service file will now point to $(prefix) of most recently installed inkscape.

Fixed GErrors. Added many GErrors, especially for unfound objects. transfered many functions to using verbs instead of the function the verb calls to make error reporting easier.

Core Dbus files. Init creates interfaces on Inkscape startup. Application and document interface provide API functions over Dbus. service.in file makes sure Inkscape starts automatically when someone connects to it over Dbus.