Housekeeping

Moved some lines around, removed old comments, updated other comments.
Allow permission check on get_configuration()

This is patchwork until a different mechanism can serve a permission
check feature.
Allow form class overrides in Searcher
Move permission code to registry

As much as possible, the permission verification should be specified
and performed in the active registry.

The AJAX views responsibile for checking lookup permission now respect
the registry permission by not declaring their own, which previously
eclipsed registry settings.  The AJAX views should not contain logic
necessary for the local search app to subclass and modify.

One outstanding problem is that only the default
`appsearch.registry.search` registry is used, as there is no convenient
location to specify a custom registry, even though BaseSearchView
appears to allow for such a thing.  The base view and the AJAX views do
not have a way to share that information.
Fix error in default attributes
Housekeeping

Removed unnecessary linebreak slash.
Update README

Descriptions of the form class overrides are now available.
Fix syntax error
Fix registry lookup

If a model class is used instead of the applabel with model name, the
method failed to return a configuration in all cases.
Repair method calling error
Fixed potential ascii encoding problem
Merge branches 'master' and 'timvalenta' of github.com:pivotal-energy-solutions/axis

Conflicts:
	lib/django-company-registration
Some clean up - and adding in my requirements..
More cleanup removal of AxisTestingCore.  RIP.
Small bugfix
Pushed in from master.