All C++11 toggles are now removed. What is left is either platform
specific (POSIX_SIGNALS, WINDOWS_SEH), or possibly still needed
(USE_COUNTER).
If current CLion is compatible with `__COUNTER__`, then we should also
force `__COUNTER__` usage.
Changed
* CATCH_AUTO_PTR -> std::unique_ptr
* CATCH_OVERRIDE -> override
* CATCH_NULL -> nullptr
* CATCH_NOEXCEPT -> noexcept
* CATCH_NOEXCEPT_IS -> noexcept
Removed
* CATCH_CONFIG_CPP11_UNIQUE_PTR
* CATCH_CONFIG_CPP11_SHUFFLE
* CATCH_CONFIG_CPP11_TYPE_TRAITS
* CATCH_CONFIG_CPP11_OVERRIDE
* CATCH_CONFIG_CPP11_LONG_LONG
* CATCH_CONFIG_CPP11_TUPLE
* CATCH_CONFIG_CPP11_IS_ENUM
* CATCH_CONFIG_CPP11_GENERATED_METHODS
* CATCH_CONFIG_CPP11_NOEXCEPT
* CATCH_CONFIG_CPP11_NULLPTR
* CATCH_CONFIG_VARIADIC_MACROS
Some files had include guards that didn't match the file name, and
others were missing the include guards entirely.
Standardized this so that every include file has an include guard, and
all the guards are of the form TWOBLUECUBES_<FILENAME>_<EXT>_INCLUDED