Bug 680131: Replace the MPL 1.1 license by the MPL 2.0 one in all files, and add it to files which miss one
r=kiko r=mkanat r=mrbball a=LpSolit

r=timello, a=mkanat

Bug 304600: Need a test in the test suite to check for dependency loops - Patch by Frédéric Buclin <LpSolit@gmail.com> r/a=justdave