A preview of a new QB64 option

[RhoSigma]

Nice idea @SMcNeill, good for quick testing of snippets or code from forum members, who just need a quick help.

Also thanks for changing the Wiki logo, now we've a common "Project identity". I've also used the typical QB64 logo colors for page and section headings, and the IDE used for code boxes gives another connection to the language. Still lot to do, but getting better.