Fix for Issue 1741
Minor bug where python versions 2.7.x where x < 5 do not support
unpacking from memoryview objects. Versions 2.7.5 and above will
use memoryview while 2.7 versions below 2.7.5  will use buffer
objects.

Manual testing was performed on versions 2.7.5 and 2.7.2 to
confirm both worked correctly.