progress
new metarelate api
review actions
rereview
Use new-style exception syntax.
Use new function attribute names.
Use 'in' operator instead of 'has_key' method.
reduce is no longer a global function in Py3.
Fix lambda functions that take tuples.

Python 3 will no longer unpack them into multiple arguments.
Add spaces after commas.
Change next calls from methods to keyword.
doc: Replace backticks with repr calls.
Add pyugrid to INSTALL
Fix weird line break comments in doctest.

I don't see any benefit to ensuring the comments here are on the same
line as the code. 2to3 gets confused by these lines, and in the HTML
results, the comments are cut off because the lines are so long, so it
seems unnecessary.
Merge pull request #1311 from marqh/mrtypes

Metarelate Types
Use operator.itemgetter where possible.
Merge pull request #1360 from QuLogic/python3-safe

Python3 "safe" fixes.
Merge pull request #1361 from QuLogic/python3-ws

Python3 whitespace changes
Merge pull request #1363 from rhattersley/pyugrid-install

Add pyugrid to INSTALL