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
Remove logging settings from settings.py

The log settings are now configured in a templated local_settings.py.
Merge pull request #91 from jwalgran/topic/logging-setup

Remove logging settings from settings.py
Add favicon

Mostly to prevent 404 messages in logs when browsers automatically request
favicon.ico. I threw in Azavea's favicon.ico as a placeholder.
Merge pull request #93 from jwalgran/topic/favicon-redirect

Add favicon