Merge commit 'f2960097'

* commit 'f2960097':
  bink: fix a check for the first frame.
  doc/developer: Drop obsolete MPlayer reference
  doc/developer: Add ISC license to list of acceptable licenses
  doc/developer: Add web links for all suggested licenses

Conflicts:
	doc/developer.texi

Merged-by: Michael Niedermayer <michaelni@gmx.at>