Add really rough draft of release instructions.

Still need to clean up and format in markdown.
Some formatting fixes I want to check are working
Finish markdown formatting
Minor fixes for clarity, correct spelling, and formatting
Mention good links to include with release announcement
Add powertrip.py script

Has checks for missing __init__.py files in test directories.
Add execute permissions validator
Add Cython-generated C code validator
Complete refactoring of the code

Much cleaner and less duplication. Added docstrings and comments.
Add powertrip.py to Travis, manifest, changelog
Add __pycache__ directory to ignored dirs

Didn't know that py3 created these
MAINT: added names in place of placeholder
Merge pull request #460 from gregcaporaso/issue-459

fix error in COPYING.txt
Address comments from @ElDeveloper and @gregcaporaso
admins -> managers
Use sets instead of tuples

Thanks for suggesting this @ElDeveloper!
Merge pull request #453 from ElBrogrammer/issue-446

Added power-tripping tool
Merge branch 'master' into release-instructions

Conflicts:
	MANIFEST.in
Add changelog mention
Add class for testing ordination utility functions

Added test for mean_and_std error handling.