Automatically load up the 'each' for types.
Add the ability to retrieve attr config.
Update Sets to use the each more effectively.
Remove automatic each creation.
Revert construction of each types.
Add a new primary type.
Add a few tests for the primary attribute.
Reduce complexity.

 - Primary keys are strings.
 - Each no longer exists.
Update composer.
Merge branch 'master' of github.drwrf:drwrf/mismatch-model

Conflicts:
	lib/Model/Attrs.php
	test/Model/AttrsTest.php