Nbind Versions Save

• Fix internal compiler error in VS2017.
• Add basic Android support.
• Allow resetting references to JS callbacks.

• Add NBIND_ALIAS macro to support enum classes.

• Fix loading multiple addons with identical class and method names.
• Move @types/node to devDependencies
• Fix some methods disappearing on Emscripten target.

• Avoid growing heap when passing objects by value.
• Support const references to std::strings.

• Fix constructors taking no arguments.
• Update development environment.

• Support std::function callbacks.
• Fix passing cbFunction by const reference.
• Add NBIND_DUPLICATE_POINTERS flag.
• Update Emscripten detection.

• Fix compiling C source files.
• Detect unbound types at run-time to avoid crash on Node.js target.

• Add noconflict.h to avoid macro naming conflicts.
• Fix ndts issue when no functions outside classes have bindings.
• Handle exceptions thrown in JavaScript callbacks.

• Avoid conflict with "check" macro in AssertMacros.h.
• Fix passing objects without a toJS method by value on Emscripten target.

Breaking changes:

• inherit is now a reserved keyword in NBIND_CLASS sections.

Other changes:

• Support (multiple) inheritance.
• Fix issue with loading multiple addons that use nbind.
• Fix issue with binding non-copyable classes.
• Allow renaming bound properties.