Add minimapAPI support

Fix for good the spawn rate for Gold Rune. Now it will (most of the time) spawn at a third of the rate of other runes.

• Divde spawn rate of the Gold rune by 4 (it is now 0.75%.) It was appearing several times per run, way too often. I hope it appears once every 2 runs now (thanks Chaon, Big john from leister and Fresh_Knight for the feedback)
  
• Transmute Dip familiars and Sumptorium clot familiars into their gold variant (thanks ptts10gmei for the suggestion)

Use Aleku's improved gold rune sprite. Thank you!

Improve the goldcarde sprite and add Magic chalk support