Refuse to update if WILDCARD_PARENT_URL is not set, and display an "Action Required" box on the front page.
Indiegogo embed during demo.
Release EtherCalc.
Merge branch 'master' of github.com:sandstorm-io/sandstorm

Conflicts:
	shell/run-dev.sh
Replace WILDCARD_PARENT_URL with just WILDCARD_URL which contains a '*' somewhere in it.

This allows you to specify a prefix before the wildcard, which allows you to potentially host multiple Sandstorm instances out of the same wildcard. E.g. we need to host both 'alpha' and 'demo' under the same wildcard SSL certificate.
Further replace WILDCARD_URL with WILDCARD_HOST because it needs to have the same protocol as BASE_URL anyway.