Improve utility functions

move make_simple_boundary to be a function instead of a testcase method.

Have make_instance take a name parameter.
Add unicode methods to models
Cleanup whitespace flakes
Merge remote-tracking branch 'upstream/master' into topic/add_unicode_methods

Conflicts:
	opentreemap/treemap/tests.py
Merge pull request #80 from steventlamb/topic/add_unicode_methods

Topic/add unicode methods