Revert "Fix sequence id fr default anim"

This reverts commit a775931a0cec9f65748c6e20dd2695edcbe21b7f.
Revert "Prevent empty Anim Packs"

This reverts commit 5561333668f61f043cdfc0733a4eb50a1bcfb14e.
Merge branch 'master' of melanie@opensimulator.org:/var/git/opensim