get/set/delslice methods were removed in py3
slight comment grammar and spelling changes
a few more cleanups of docstrings
a few more docstring modifications
Fix IterIO
merge from upstream
Merge pull request #369 from untitaker/sprint-branch

Fix IterIO
Merge pull request #365 from ThomasWaldmann/sprint-branch

get/set/delslice methods were removed in py3
Merge pull request #367 from tbrooks8/sprint-branch

Sprint branch