refactored test names. deleted old option_var attempt
Refactores gtests. Added basic dbg and prof capabilities, and dumper class

- gtests now run in a single exe, with contexts separated by diferent header files
- beast/debug.hpp and beast/prof.hpp define basic macros for controling code only on Debug/Profile configurations
- added beast::profile::dumper which outputs several (name, value) pairs in csv format
- added beast_profile-hello_world. Shows an example of time measuring using dumper, that only outputs in Profile mode