Further renaming of DBus variables (object -> app_interface/doc_interface and doc_context -> target) Fixes to application interface for document_new (now only works in console mode, and behaves as expected)

Modified dbus interface so that it works in console mode (--dbus-listen) Modified action context setup so that in console mode, when a document is added to the main inkscape app instance, it gets a selection model and layer model automatically set up for it Made a couple more verbs work in console mode

Added proposed interface file. Fixed other xml files to have xml file declaration before comments.

Made wrapper functions non static. Added lots of documentation.

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.