v0.2.0

Breaking changes:

• Rename nbind/BindingShort.h to nbind/nbind.h
• Rename module on JavaScript side from nbind.module to nbind.lib

Other changes:

• Add full Emscripten support.
• Support passing arrays as parameters and return values.
• Eliminate compiler warnings in Visual Studio.
• Always compile with -O3.
• Improve tooling for easier setup.
• Improve readme and add logo.