Add python3 doc building capability
Merge pull request #1286 from blink1073/python3-doc-build

Add python3 doc building capability
Merge pull request #1288 from pratapvardhan/morph-selem

Minor cleanup for morphology/tests/test_selem.py
Misc PEP8 fixes
Merge pull request #1289 from ahojnnes/random

STY: Misc PEP8 fixes
Merge pull request #1290 from pratapvardhan/morph-selem

TST: Test for selem.cube