Reworked noise functionality and new Py5Vector class

New Features:

• Reworked noise functionality. The Python noise library is no longer used to generate noise; the library has been removed as dependency. Instead, py5 uses the OpenSimplex noise algorithm and Processing's noise algorithm. The OpenSimplex algorithm is provided by KdotJPG's OpenSimplex2S implementation.
• New Py5Vector class

Fixes:

• Fix #50
• Fix #52