PT-1315 Exposed form as a configurable block.

	modified:   projects/petitionssignatureform/petitionssignatureform.module
PT-1315 - Replaced PetitionssignatureformException with InvalidArgumentException.
PT-1315 - Made various low level code improvements and coding standards/documentation edits.
PT-1315 - Fixed a few bugs and notices. Improved error handling.
PT-1326 - Proof of concept ajax thank you message.

	modified:   petitionssignatureform.admin.inc
	modified:   petitionssignatureform.module
PT-1326 Built upon AJAX thank you message proof of concept.

  - Theme function
  - Fixed small typo on admin form
  - Cleaned output of AJAX title and message
  - Code comments

	modified:   projects/petitionssignatureform/petitionssignatureform.admin.inc
	modified:   projects/petitionssignatureform/petitionssignatureform.module
	new file:   projects/petitionssignatureform/templates/petitionssignatureform-thank-you.tpl.php
PT-1326 - Centralized variable defaults handling.
PT-1326 - Documented and generalized thank you template.
PT-1325 - Updated form arrangement and default text.
PT-1325 - Made "Sign up" field label configurable, fixed missing descriptions on the admin form, and improved some interface text.
PT-1346 Added form submission error handling from response code.

	modified:   projects/petitionssignatureform/petitionssignatureform.module
PT-1346 Fixed AJAX error handling

	modified:   projects/petitions/modules/custom/wh_petitions/wh_petitions.module
	modified:   projects/petitions/themes/petitions44/css/style.css
	modified:   projects/petitions/themes/petitions44/sass/style.scss
	modified:   projects/petitionssignatureform/petitionssignatureform.module
PT-1346 Added a runtime check for config values before showing the form

	modified:   projects/petitionssignatureform/petitionssignatureform.module
PT-1346 Deleted front end validation in favor of AJAX's.

	deleted:    projects/petitionssignatureform/petitionssignatureform.js
	modified:   projects/petitionssignatureform/petitionssignatureform.module
PT-1346 - Centralized configuration checking and improved error message.
PT-1346 - Added @todo comment to sophisticate error message suppression.
Updated README.

	new file:   README.md
	deleted:    README.txt