Version 1.5.0, Comments, math functions, strict semicolon usage

[joente]

Description

The main changes by this pull request are:

• Implementation of math functions and constants.
• Comments as white-space.
• Strict usage of semicolon between statements. (still flexible with last statement within a block)

Type of change

• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

How Has This Been Tested?

• Added tests for all math functions and constants.
• Update syntax check test with comments usage.

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• New and existing unit tests pass locally with my changes