ENH: Updating to use pre-patched SWIG 2.0.11-1

The downloads on the midas server have been pre-patched to avoid
maintaining multiple scripts which patch, and containing SWIG code.
Merge pull request #8 from blowekamp/UpdateToSimpleITKSWIG2.0.11-1

ENH: Updating to use pre-patched SWIG 2.0.11-1