Validate all fields in standard package

[StuartFeldt]

Field	Validation	Required
Hashtag	must not contain spaces, <255 chars	true
Site Name	<255 chars	true
Subdomain	must not contain spaces, <255 chars , start with alpha	true
Start Date	warn if past date	true

[StuartFeldt]

Live check to see if subdomain is available -- checkmark/x -- similar to lots of sites that see if a username is available before you hit submit