Inconvertibool

Version 1.1.5 adds an "inconvertibool" type that works like and with bool, but not with other types like int. This is a safer substitute for built-in bool if you are concerned about implicit conversions of bool that may be bugs. Inconvertibool gives you the implicit conversions you want and prevents the implicit conversions you don't. By request of Christoph Weiss. Thanks for the suggestion!