BUG: Pixel traits fix for signed and unsigned short
COMP: Fix non-const size array heap allocation."

This fixes build with VC compiler
Merge branch 'TraitsSHORTFix'
Merge pull request #2 from jmargeta/TraitsSHORTFix

BUG: Pixel traits fix for signed and unsigned short
Merge pull request #3 from jmargeta/ArrayAllocationFix

COMP: Fix non-const size array heap allocation."
Merge https://github.com/tobiasmaier/itkPyBuffer