Several small attribute fixes and improvements

• Enctype can be set on forms
• ID can be set on hidden fields
• Custom attributes can be set on forms

Form Validation, Helptext, Custom Text Control type, Number control

Adding form validation using session storage, helptext for controls, custom input type on the text control, number control.

v1.1.0, custom html control

Version 1.1.0 has a new control that can handle custom html.

First release

First stable release of the bootbuilder project.