Depend on skosprovider 0.4.0
Make compatible with 0.4.0

Added Conceptscheme

Added suborindates and superordinates and adapted logic.
Add notes to collections.

Make the provider add skos:notes to Collections created by the provider.
Make Collections note aware in import provider.
Update HISTORY.
Add matchtypes.
Add matches.
Updated history.
Further updates on matches.
Get matches working.
Extra test and docs.
Update language handling in label function.

Better handling of languages in label function through the language-tags
library.
Update length of language identifier field to 64 chars.
Drop support for python 2.6 and 3.2.
Merge branch '0.3.0'