Self-signed certificate support on TqRestClient

It's a common thing especially in enterprise code to communicate with servers that are self-signed. You do still trust the server in question but you don't wish to completely ignore all certificate checking across all of the url connections. Thus this feature was added to allow for improved usability of restful connections without exposing security concerns across an application.

Also properly handles Sparklin outputting of Iterables.

Validation framework improvements for "arrayOf" types.