Maintence in test_client.py
Add ContextError class.
Add decorators.py, contains @local, @vectorize and their base class.
Add test_decorators.py, test local, vectorize, and utilities.
Remove the odin module since the local decorator is in Context.
Update examples/demo.py to not use odin.
Make numpy available on the engines.
Remove with_context stuff.
Remove with_context tests.
Fix testing bug.

Bug from implicitly assuming dict ordering.
Spelling errors >:|
One execute statement, to avoid round trips.
Reflect API changes in odin_demo.py
Merge pull request #132 from cowlicks/vectorize-local-decorators

Add vectorize and local decorators