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 appending terms of service, etc.

	modified:   projects/petitions/modules/custom/wh_petitions/wh_petitions.module
PT-1346 - Implemented new configuration test in petitions signature form alter.
PT-1325 - Removed wh_petitions dependency on petitionsignatureform.
petitions subtree from git@github.com:WhiteHouse/petitions.git
PT-1325 - Added petitionssignatureform to drupal-org.make.
PT-1325 - Added petitions-php-sdk to drupal-org.make.