Easier changing of settings for local development.

Create a local.py in settings/ - it has access to the current settings.
Fix UTF-8 decoding in Akoma Ntoso import.

The decode() added in b5193ac3 needs to specify UTF-8 for Python 2.
Merge branch 'master' into issues/52-unknown-speakers

Conflicts:
	speeches/importers/import_akomantoso.py
Fix bug in AN import with 'from' and namespace.

child.find() will only find the <from> element if the XML document has
no namespace. As it's a direct descendant, we can use hasattr instead
which covers both scenarios.

Also add tests to fix #318 and test a number of previous changes.