remove blender-2.5[45] ebuilds
blender: use bugs.gentoo.org svn version Rebase blender-2.54_beta.ebuild to the svn version blender-9999.ebuild from bugs.gentoo.org. Changed the ebuild on a few places in order to make it working with the 2.54-beta version of the source code.
add blender-2.54_beta - copy version 2.49b from portage - adapt it for the new needs