Combine forms. Add requirement validation checking

* Combines the separate organization, individual, and dedication forms
* Adds validation checks to make sure conditionally required fields are met
* Adds JS to show/hide the organization/individual fields
* Runs all of the JS on page init. This is useful if the user has a validation error as the values on the form might not be their 'defaults' on page load in this case
Ooh, I like this.