New Feature: Text.Anker

Changed: Render-Update-Sleep 20 → 40, Rendering isn't antialiased anymore, only text (TODO: Re-Enable for Circles), opacity and rotation only executed when needed, screenshots are now async and support PNG-files
Bug-Fix: Figur-Collision
Show Exceptions in Ticker.tick()
Shutdown single ticker on uncaught exception
Add new shortcut methods
Move dependant methods together, remove some TODOs, fix some docs
Add Vektor-Tests
Add Ticker-Debug-Mode
Fix Knoten.setOpacity