add more test / delete ruins

[ObiWahn]

In this lib is code that is not tested and not used anywhere. Ruins must be found and eliminated or at least secured with static asserts and comments. Then it will be obvious that the code should not be used.

files:

• ext/meta/has_member.hpp -- ok
• ext/meta/if_all_any.hpp -- removed
• ext/meta/if.hpp -- removed same as std::conditional
• ext/meta/is_one_of.hpp -- ok
• ext/meta/pack.hpp --removed
• ext/meta/static_lambda.hpp --removed
• ext/meta/tuple.hpp -- reviewed -- TODO add test
• ext/meta/void_t.hpp --removed same as std::void_t
• ext/concurrent/hierarchical_mutex.hpp -- removed
• ext/concurrent/threadsafe_queue.hpp -- removed
• ext/concurrent/threadsafe_stack.hpp -- removed
• ext/structures -- removed
• ext/structures/simple2darray.hpp -- removed
• ext/structures/multi_array.hpp -- removed
• ext/structures/vector.hpp -- removed
• ext/util/lru_cache.hpp
• test dynamic lib usage