ExpressionJ Code

- Fix the evaluation of functions which did not work when using arrays as arguments
- Fix the ExpressionCombiner not taking correctly into account CodeBlock expressions
- Add the "~" character to the list of allowed characters
- Fix the behavior of the ExpressionCombiner used with a CodeBlock
- Add the new "boolean" syntax for booleans in addition to "bool"
- Fix the simplification of expressions with blocks, if-then-else, and while which were not handled
- Change the package to org.expressionj
- The distribution is now a Java 9 automatic module
- Fix several exception messages
- Allow to use a File or URL to parse an equation
- Add a wiki