* src/tracker-extract/tracker-extract.c: Check file size is
	non-zero before trying to extract metadata from it. This saves us
	time and warnings in the log.

	* src/tracker-extract/tracker-main.c: Added GOption based command
	line argument handling. Also added -m for mime -f for filename and
	-v to set the verbosity to something other than the default config.

svn path=/trunk/; revision=2910