Add support for value_type.
Take extra attributes of value-type into account when checking them.
Parse resource according to their type.
Add formatting for value-types.
.travis.yml: Add dep on dateutil.
.travis.yml: Fix dateutil package name.
setup.py: Fix dateutil package name.
Split Resource into subclasses and do not parse time.
Add test for time.
Add support for getting unknown attributes.
Add language to StringResource.
fix TimeResource's possible attributes.
unused import.
unused dep.
Merge pull request #11 from ProjetPP/value-type

Value type