Merge pull request #166 from wardi/master

trim_package: accept pilot uuids properly, better tests
load-datasets: report UnicodeDecodeErrors as well
navl schema: convert to unicode before boolean test
trim_package: convert to unicode before boolean test
trim_package: fix for missing tag vocabularies
make resource size optional for now
fill in fixed values: license, author_email; require license
trim test: fix bad sample data
navl test: add now required license
use correct language version of fixed values
schema: update fixed values, add attribution field
fix trim_package for fixed fields (ignore them)
proposed_schema: changes from client
schema description: update from proposed
dataset form: select catalog_type=data by default
correct Licence spelling, show correct language version of license title
test: navl schema is validating resource size