Replace native .options with jQuery .children()

Fixes aldeed/meteor-autoform#101
Add jquery dependency

Relates to aldeed/meteor-autoform#101
Reimplement with jQuery

Fixes aldeed/meteor-autoform#101
Add missing )

Relates to aldeed/meteor-autoform#101
Add !== undefined to .attr to make equivalent to hasAttribute
fix onSubmit function signature
clarify Schema namespace
use schema `defaultValue` as the default checked state for boolean check box, radio, select; fixes issue #108
bump version
better implementation of defaultValue support