ASL version 1.11.2

Some small changes.

• TextFile will now open in WRITE mode when writing to it if it was not opened (not in APPEND mode)
• Use Xml::put() to set a child element's text content (not set() which might change behavior in the future to set an attribute)
• deg2rad(int) will now return a double so we can now safely do deg2rad(45)
• Better support for newer pybind11 versions for Python bindings
• changes in solveZero() to stop iterations if residual increases several times
• Better Var assignment to an initializer list
• In Random::normal(m, s), s is the standard deviation (fixed documentation)