Adding calculated_value
Adding has_get_value
Adding has_value
Adding value_to_stream
Add ::value and ::get_value to algebraic data-types
Use value_to_stream in monadic_calculator
Fix metatest documentation
Move the exception_debug example to metamonad
Fix documentation
Reduce to_stream usage in examples
Fix documentation
Reduce to_stream usage
Use Boost.Test
Fix compilation and include guards
Make CMake usage platform-independent