proposed_schema: add ckan type, fix language example
metadata schema: convert gc_multiplicity to mandatory T/F
metadata schema: include types for all fields from proposed_schema
metadata schema: remove unused proposed_name, proposed_type fields
README: list new field types
fix field description links
README: better descriptions of new field types
Merge pull request #99 from wardi/master

metadata schema: add field type information, manadatory flag, document in README, remove unused attributes