merges fixes to allow saving file with new metadata

merges fixes to allow saving file with new metadata

merges fixes to allow saving file with new metadata

merges fixes to allow saving file with new metadata

Merge branch 'ewagstaff-master'

Added compatibility for Python 3.5

fix dataset condition - closes issue #6

bump version

make everything flake8-passing

remove old release mementos (we have DVCS don't we?)