x3.0 Beta Release 2

This is x3.0b2, the second beta release of x3.
Changes between b1 and b2 include:

• Prepare repository to be uploaded to PyPI
• Bug and language fixes
• Make importing use module path rather then current directory
• Implement unit testing (currently just math)
• Make use of os.sep rather then calling .replace() and .split()
• Allow modules to define metadata inside a .xconfig file
  • Allow the importing of a Python entrypoint rather then xpp
• Readd multiline statements
• Rewrite exception handler
  • Ensure that line numbers are accurate
  • Highlight where the problem occurs inside a line
• Allow in-line comments
• Fix documentation
  • Add Python API documentation
• Readded read, with the same parameters as x2

Full Changelog: x3.0b1...x3.0b2