Fix #14: Checkbox value now set in ajax calls

[cambell-prince]

• Changed utils.js in set the checkbox value = 0 for an unset checkbox rather than skipping the element.

[apmuthu]

This has been fixed in my repo at: https://github.com/apmuthu/frontaccounting/commit/bf9b1fa2e8454bc35f003fa9b9518b881e0ead40

@joe: please pull this one in.