Three fixes;

- Previous commit had a line of code of WIP project in it... tss

- Packed Library data was not freed

- Removed recent (post 2.65a) code to exclude packed data from Undo system.
  It's internal data thats part of file spec, errors happen for example on
  restoring quit.blend or temp saves.



git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@53763 954f8c5b-7b00-dc11-b283-0030488c597c