* Getting rid of old dapps
* Updating proxypac and allowing home.parity on signer
* CORS support for API
* Fixing CORS - origin is sent with protocol
* Fixing signer with proxy
* Fixing grumbles
* Fix expect msg [ci:skip]
* Refactoring dapps to support API endpoints.
* Using ContentHandler for unauthorized requests
* Extracting url stuff
* Adding ping endpoint
* CORS support for ping request
* Fixing url.is_none()
* minor formatting fix
[ci:skip]