Updating SimpleITK to 0.8rc1 and SWIG to 2.0.12

Sam Horvathrequested to merge
github/fork/blowekamp/SimpleITKUpdate0.8rc1 into master

Created by: blowekamp

This version of SimpleITK addresses compilation issue with clang 5.0 on OSX with libc++. SimpleITK will now automatically be compiled with "-std=c++11".

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