gtk fixes:

gtk fixes:
in Makefile
- fix datadir for mingw users
- remove the shared lib during the clean rule
- use $(ENCODE_BIN) instead of x264_gtk_encode
- add some $(DESTDIR) and create some directories when necessary
- remove -lintl
statfile_length -> statsfile_length
fix the "sensitivity" of the widget of update_statfile
the logo is now handled correctly on windows
added: beginning of multipass support
patch by Vincent Torri.

git-svn-id: svn://svn.videolan.org/x264/trunk@580 df754926-b1dd-0310-bc7b-ec298dee348c