Minimize header dependencies OTA....hpp
Merge pull request #176 from BugFreeSoftware/header_minimize_A

Header minimize A
Minimize header dependencies OTBxxx.hpp
Minimize header dependencies OTCxxx.hpp - OTDxxx.hpp
Minimize header dependencies OTExxx.hpp - OTLxxx.hpp
Minimize header dependencies OTMxxx.hpp - OTOxxx.hpp