If you use the LUAJIT_ENABLE_LUA52COMPAT compilation flag with LuaJIT, C++ container can be used just fine with `ipairs` or `pairs` as these properly check the metatable keys `__ipairs` and `__pairs` used by sol to implement this behaviour.
- Add a flag to allow size_t(-1) and similar shenanigans (SOL_ALL_INTEGER_VALUES_FIT)
- Half-fix, but not fully, for #1183, #1072, #1038, #965
- Fix#1126
- Prepare for #1061