Add gstmozilla plugin. This doesn't work with system gstreamer as of yet, since it doesn't load any plugins in gst-plugins dirs. It also possibly doesn't work with bundled gst, can't test that
gstmozilla: Move the plugin to be in the components/mediacore/gstreamer tree
gstmozilla: Build the plugin for both bundled and system gst
gstmozilla: preprocess gst_libs file and add gstmozilla plugin to list
gstmozilla: preprocess gst_libs_macosx.txt file, add gstmozilla plugin to list

Need to double check the plugin name on debug builds
gstmozilla: preprocess gst_libs_windows.txt file, add gstmozilla plugin to list

TODO: Make sure that preprocessing gst_libs_windows.txt fixes the need for the perl substitution in the Makefile. There is no ogg.dll in the list, only ogg-0.dll, so I suspect that substitution isn't needed right now anyways...
Merge the sbGstreamerService. Hopefully I didn't mess up anything.
Fix typo in gstmozilla plugin makefile
fix another typo in the gstmoz plugin makefile
gstmoz: remove some extraneous includes/imports
gstmoz: revert/undo preprocessing of gst_libs files in stub
gstmoz: define needed vars for GST_PLUGIN_DEFINE

We could probably get rid of the config.h imports as well, unless we
want to use config.h to define the vars later.
gstmoz: link xul and add linker flags to find libxpcom.so at runtime
Remove unneeded arguments
tweak ldflags for gstmozilla plugin