Add support for kinetics MathML functions

Full list can be found here: http://co.mbine.org/specifications/sbml.level-3.version-2.core.release-2.pdf

Implement at least those:

• arithmetic operators: plus, minus, times, divide, power, root, abs, exp, ln, log, floor, ceiling, factorial, quotient, max, min, rem
• trigonometric operators: sin, cos, tan, sec, csc, cot, sinh, cosh, tanh, sech, csch, coth, arcsin, arccos, arctan, arcsec, arccsc, arccot, arcsinh, arccosh, arctanh, arcsech, arccsch, arccoth