Closes#111 - fixed
Closes#110 - need to test exactly how much extra speed was gained
Closes#108 - seems to be fixed, albeit std::mutex is a butt on VC++
additional tests to make sure pass-by-value and copy semantics work as intended
new proxy_base class to reduce code duplication
update function / protected_function usage (to solve starwing's issue while keeping code as clean as possible)
userdata now performs lookup based on tables
userdata now has reduced number of vector tables
userdata garbage collection improved
debug.hpp - new header for debugging problems with stack, mostly for internal use