Py-expression-eval

Fixes:
* Swap math.pow with self.pow 69

Fixes:

* Parse 'in ' operator with space at the end so functions named 'in*' are supported

Fixes:
* Removed unprintable character (0xC2)

* Make string literal quote types configurable

* Add IN operator
* Add NOT ans XOR operators
* Add trigonometric functions: `sind`, `cosd`, `tand`, `asind`, `acosd`, `atand`
* Fix `random` function

* Fix: allow strings with double quotes