Generalize logging, cleanup pluralizer
Add accent stripper, beginning of graceful code reload util.

Also some lint cleanups of the util file.
Fix models to not die on missing column defs

Also clean up some minor code formatting.
Change humanize date code to handle old dates
Add random default prefix to cached content
Add MultiFieldSet object to forms
Change MultiFieldSet to a list subclass
Merge branch 'master' into dev

Conflicts:
	pybald/core/__init__.py
	pybald/util.py