Increased version to 0.3.dev1 after release of 0.2.

(commit by unleash 0.5.8.dev1)
Subtypes include parameterless specific vs one with parameters.
Added more pleasant __repr__ for MIMEType.
Added MIMESet convenience class.
Updated docs on how ordering works.
Reverse on sort.
Changed name of function to get_most_specific_parent.
Added missing closing ) on __repr__.
Use networkx to determine incoming mimetypes.
Single traversal and predicate checking function.
Finished docs.