Fix #482
Add @logemann, @blackfyre, and @tureki to the contributors
date validator doesn't allow negative day/month/year
Remove unused fonts
Upgrade to v0.5.0
Merge branch 'docs' into docs-dev

Conflicts:
	_config.yml
	examples/attribute.html
Merge branch 'docs-dev' into docs
Add Using Ajax to submit the form example
Add Default English message section
Showing valid message example
Add Czech and French packages
Add HTML 5 example for URL validator
Add Polish language package
Add @troymccabe to the list of contributors
Add Belgium (Dutch) language package
Add Overriding default options example
[wip] Adding dynamic field example
Add added.field.bv and removed.field.bv events; Complete Adding dynamic field example
Showing messages in custom area example
Showing messages in custom area example