Add 'dimensional' and its missing dependency, 'numtype'

This pull request adds the following packages: dimensional=0.12.1 and its only missing dependency, numtype=1.0.1

Built packages for i686 and x86_64 can be found at: https://sites.google.com/site/glgarchhaskell/packages

I am willing to maintain, i.e. reupload when new versions are available.