* src/libtracker-common/tracker-thumbnailer.h:
        * src/libtracker-common/tracker-albumart.h: Added preprocessor
        checks for __LIBTRACKER_COMMON_INSIDE__ which were missing.

        * src/libtracker-common/tracker-albumart.[ch]: 
        * src/tracker-extract/tracker-extract-mp3.c: Fixed coding style
        issues.

        * src/libtracker-common/tracker-albumart.[ch]: 
        * src/tracker-extract/tracker-extract-albumart.c:
        * src/tracker-extract/tracker-main.[ch]: Only create one
        TrackerHal object during the life time of tracker-extract instead
        of for EVERY file which has album art (which is quite a lot). This
        seems to be showing an increase of 2x the speed now for
        tracker-extract. 

        * src/tracker-indexer/tracker-main.c: (main): Added print
        statement like we have in the daemon so we know when the process
        is finished and returning to the cmd line.

        * tests/tracker-extract/tracker-extract-test-utils.c:
        (tracker_test_extract_file_access): Added tracker_main_get_hal()
        fixes to ensure the tests build.