new sol::filters (currently undocumented)
new gc tests, new plain_type tests
core abstractions over usertypes streamlined
SOL_STRINGS_ARE_NUMBERS triggers added
update single
added variadic_results, to return a variable number of arguments to Lua
added variadic_results and as_results
added improved function examples (for multiple results and split overloading out)
added tests for variadics
added tests for C++17 utilities
added a forwarding header
added a specific `unsafe_function` header
added and improved documetation pages
Added the ability to extend all usertypes at runtime. The performance implications need to be examined closely.
variadic_args documentation was updated with the desired example demonstrating proper usage
usertype examples were updated demonstrating Lua runtime and C++ runtime updating of a usertype table
SOL_SAFE_FUNCTIONS is now part of the definitions and defined (thanks @eliasdaler)