updated memoryview test to skip on Py 2.6.2
updated memoryview test to skip on Py 2.6.2

souravsingh/khmer,ged-lab/khmer,ged-lab/khmer,souravsingh/khmer,ged-lab/khmer,F1000Research/khmer,souravsingh/khmer,F1000Research/khmer,F1000Research/khmer