kind of fixed backwards seeking with vqf - ff/rew works but it's rather
inaccurate, I don't know how to improve it atm.
patch by Balatoni Denes <pnis@coder.hu>
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@8543 b3059339-0415-0410-9bf9-f77b7e298cf2
based on patches by Balatoni Denes <pnis@coder.hu>
changes by me: glib dependency removed, files merged, code simplified, some bugfixes
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@8529 b3059339-0415-0410-9bf9-f77b7e298cf2