- Small speed improvements
- Small speed improvements

Original commit message from CVS:
- Small speed improvements
- added id3 tag support

This is a POC for metadata notification, benefits of using gobject
properties and GstCaps are basically:
- GstCaps as boxed type (g_strdup_value_contents() etc works)
- g_object_notify to notify the app of (new/updated) metadata
- deep_notify to get easily pass metadata up in the pipeline
- GstCaps API for easy parsing of lists, strings, ints etc.
- GstCaps mime type to describe the type of metadata (ID3 tags,
standard Gst tags etc)
- easy method of setting metadata on objects/pads (for encoders)

ahmedammar/platform_external_gst_plugins_ugly,ylatuya/gst-plugins-ugly,Kurento/gst-plugins-ugly,alessandrod/gst-plugins-ugly,GrokImageCompression/gst-plugins-ugly,alessandrod/gst-plugins-ugly,prajnashi/gst-plugins-ugly,ahmedammar/platform_external_gst_plugins_ugly,Distrotech/gst-plugins-ugly,collects/gst-plugins-ugly,matsu/gst-plugins-ugly,sebras/gst-plugins-ugly,jahrome/gst-plugins-ugly,GrokImageCompression/gst-plugins-ugly,sebras/gst-plugins-ugly,krieger-od/gst-plugins-ugly,PPCDroid/external-gst-plugins-ugly,freedesktop-unofficial-mirror/gstreamer__gst-plugins-ugly,surround-io/gst-plugins-ugly,krieger-od/gst-plugins-ugly,matsu/gst-plugins-ugly,shelsonjava/gst-plugins-ugly,freedesktop-unofficial-mirror/gstreamer__gst-plugins-ugly,PPCDroid/external-gst-plugins-ugly,alessandrod/gst-plugins-ugly,shelsonjava/gst-plugins-ugly,knuesel/gst-plugins-ugly,jpakkane/gstreamer-plugins-ugly,prajnashi/gst-plugins-ugly,ylatuya/gst-plugins-ugly,GStreamer/gst-plugins-ugly,collects/gst-plugins-ugly,jahrome/gst-plugins-ugly,freedesktop-unofficial-mirror/gstreamer__gst-plugins-ugly,surround-io/gst-plugins-ugly,freedesktop-unofficial-mirror/gstreamer-sdk__gst-plugins-ugly,PPCDroid/external-gst-plugins-ugly,StreamUtils/gst-plugins-ugly,reynaldo-samsung/gst-plugins-ugly,krieger-od/gst-plugins-ugly,collects/gst-plugins-ugly,GStreamer/gst-plugins-ugly,collects/gst-plugins-ugly,Lachann/gst-plugins-ugly,Kurento/gst-plugins-ugly,cablelabs/gst-plugins-ugly,fluendo/gst-plugins-ugly,knuesel/gst-plugins-ugly,GrokImageCompression/gst-plugins-ugly,ahmedammar/platform_external_gst_plugins_ugly,GStreamer/gst-plugins-ugly,shelsonjava/gst-plugins-ugly,freedesktop-unofficial-mirror/gstreamer-sdk__gst-plugins-ugly,krieger-od/gst-plugins-ugly,jar1karp/gst-plugins-ugly,Distrotech/gst-plugins-ugly,Distrotech/gst-plugins-ugly,fluendo/gst-plugins-ugly,matsu/gst-plugins-ugly,cablelabs/gst-plugins-ugly,Lachann/gst-plugins-ugly,jar1karp/gst-plugins-ugly,surround-io/gst-plugins-ugly,ylatuya/gst-plugins-ugly,jahrome/gst-plugins-ugly,reynaldo-samsung/gst-plugins-ugly,Lachann/gst-plugins-ugly,StreamUtils/gst-plugins-ugly,Distrotech/gst-plugins-ugly,jar1karp/gst-plugins-ugly,knuesel/gst-plugins-ugly,Distrotech/gst-plugins-ugly,jpakkane/gstreamer-plugins-ugly,StreamUtils/gst-plugins-ugly,Kurento/gst-plugins-ugly,prajnashi/gst-plugins-ugly,matsu/gst-plugins-ugly,jpakkane/gstreamer-plugins-ugly,cablelabs/gst-plugins-ugly,fluendo/gst-plugins-ugly,freedesktop-unofficial-mirror/gstreamer-sdk__gst-plugins-ugly,reynaldo-samsung/gst-plugins-ugly,sebras/gst-plugins-ugly