Rename the date8601 validator with isDate8601 and add custom message by default if none is present
Rename the date8601 validator with isDate8601 and add custom message by default if none is present

Signed-off-by: Henrique Vicente <d390f26e2f50ad5716a9c69c58de1f5df9730e3b@gmail.com>

henvic/thin.gs