Change LocalArray indexing to be global.

Global indexing is at global_get/setitem
Reflect changes to LocalArray indexing in DistArray
PEP8 localarray.py
PEP8 E265 "block comments should start with a '# '"
Merge pull request #261 from cowlicks/pep8-E263

PEP8 E265 "block comments should start with a '# '"
Address @kwsmith's comments.
Merge pull request #250 from cowlicks/local-indexing

LocalArray API: indexing
Merge branch 'master' into feature/refactor-local-maps

Conflicts:
	distarray/tests/test_decorators.py