new package: rar

An update of the rar package which is stuck on version 2:4.2.0-1 in Ubuntu and Debian.
The source package should contain these two tarballs:
http://www.rarlabs.com/rar/rarlinux-5.1.1.tar.gz
http://www.rarlabs.com/rar/rarlinux-x64-5.1.1.tar.gz