Core: prevent unnecessary $() rewrapping, re-use local var instead
All: Format HTML as per jQuery style guide

Fixes #1101
Closes #1104
Demos: Fix includes in themerollered demo
Additionals: Add postalcodeIT method

Closes #1107
Demos: Fix captcha and marketo demo

Closes #1103
API Use aria-describedby for non-label elements
Fixes #900