Require Scons 0.96.91+, removed try/catch for older Scons API, changed cache file name.
Require Scons 0.96.91+, removed try/catch for older Scons API, changed cache file name.

git-svn-id: 493edb1aabd9361e12d1b994f475f0ee8eea41ad@7836 b0b80210-5d09-0410-99dd-b4bd03f891c0

sebastinas/libmusicbrainz,metabrainz/libmusicbrainz,metabrainz/libmusicbrainz,matthewruhland/libmusicbrainz,matthewruhland/libmusicbrainz,metabrainz/libmusicbrainz,sebastinas/libmusicbrainz,sebastinas/libmusicbrainz,matthewruhland/libmusicbrainz