pylint work
pylint work, #99
pylint work, #99
pylint work, #99
pylint work, #99
pep8 work, #99
Pylint work, #99
pylint work, #99
pylint work, #99
pylint work, #99
pylint work, #99
pylint work, #99
pylint work, #99
pylint work, #99
pylint work (head is now broken), #99
pylint work, exposed mantissa, exponent, guard bits in QCC, QCD

issue #99
Refactored out read_common, remove ambiguity on return type.

It was the case that _read_common could return either a list, a view, or
an image cube depending upon the jp2 subsampling or the image
dimensions.  No more.  Closed #100
Closes #101
pylint work, #99
pylint work, closes #99