notably, test normal + single + generated + Lua 5.3.5 only once,
then only run the runtime_test and compile_test for normal for all other permutations to help increase text matrix throughput
add new shared_ptr differentiation mechanism that persists between DLLs (fixes#661)
change valid Lua version to handle Lua 5.4.0-work1 (fixes#649)
remove upper limit on MSVC version: they're not fixing it anytime soon (fixes#655)
add integer value for definition (fixes#651)
* Note that MSVC Compilers may require /bigobj
So when making heavy use of headers or templates, MSVC will error with ["Fatal Error C1128"](https://msdn.microsoft.com/en-us/library/8578y171.aspx). The solution is to use the [/bigobj](https://msdn.microsoft.com/en-us/library/ms173499.aspx) flag. This does, however, mean that, as per msvc docs, "Linkers that shipped prior to Visual C++ 2005 cannot read .obj files that were produced with /bigobj".
* Update usertype.rst
Need to begin wrok to fix wstring_convert and replace it with some decent UTF conversion algos. It's surprisingly difficult tof ind such...
Fixes#572Fixes#569Fixes#567
Add name of project at top of license
fix container_traits with respect to boost::property_tree: Fixes#554
fix as_table with a vector of tuples (forward_get ignored constness): Fixes#552
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
improve exception documentation
improve state_view default handlers
add SAFE_PROPAGATION defines for compiling C++ as Lua
add examples for automatic operator registrations and as_container
fix tutorial code
change tests to not throw unless absolutely necessary
provide synchronization for file writing in tests
provide thread safety around thread tests for REQUIRE
add ostream automatic support
change 5.1 compat to only kick in luaL_loadbufferx and luaL_loadfilex when LuaJIT is version 2.0.1 and lower
fix how `stack_aligned_protected_function` and its friends behave
add new internal handler details to allow for stack-based handlers with maximum performance
update `string_shim` typedef to simply be called `string_view` and use `string_view` in all public-facing APIs.
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
