Fix parser failure on parentheses

This bug was introduced with c7a0f143fee5b529688f024892326f0174afd01b.
Change alignment in Parser.funName to make room for longer functions
Add support for missing trigonometric functions to parser
Remove deprecation mark from Symmath.Parser
Merge branch 'pu/parse' into next
Merge branch 'next'

Pulling the fixed parser for infix expressions.
Fixed function names (upn -> rpn) as well as unary-operator regression