* data/services/image.metadata: Fixed errors stopping file from
	being loaded.

	* src/libtracker-db/tracker-db-manager.c: Improve debugging so we
	see exactly what each .metadata file loads and also added GError
	to g_key_file_load* functions for metadata and service files so if
	they don't load we know why in the logs.

svn path=/trunk/; revision=3109