McHorse's McLib

This patch updated needed for Blockbuster 2.2.2.

• Added new math functions to the parser: acos(value), asin(value), atan(value), atan2(y, x), randomi(min, max, seed), roll(num, low, high), rolli(num, low, high) and hermite(x)
• Fix text field's cursor gets reset to start after resizing