These asserts were there because this shouldn't happen, I added them back for debug builds. We really should find the cause of any violations.

TODO: check if this also works on other platforms

Easier colored_mana scripting in keyword system for Magic and Vanguard.

Softer colors in graphs, the border of bars etc. is now lerp(black,fill,0.5) instead of just pure black.
Also tweaked the magic card_color graph colors a bit

fixed regex escaping bug, keywords with params are now no longer recognized if followed by an opening parenthesis

A mana cost of "31/2" is now broken up as "3","1/2".