Protect against edge for invalid iframe
Remove unnecessary resizeScrollThreshold param
Disable scroll bars if auto resizing

This fixes the flashing scroll bars issue
Add bootstrap 3 form styling to demo page
Remove extra resize height padding

It's not needed since scroll bars are now 
hidden, and it was messing up the scroll 
distance calculation
Resize immediately on ENTER key down
Reduce resize debounce time on keyup
Update compiled assets
Remove duplicate options merge

Options are already merged with defaults
in shallowExtend
Fix issue with toolbar options being ignored
Remove unused defaultOptionsCache
Remove unnecessary global
Standardize tags options syntax
Use href to check <a> href attribute

href allows for mailto and other valid href 
links while url is limited to http[s]://
Replace <strong> with <b> in editor
Update compiled assets