Split from #40

Default DateTime.Compare ignores the Kind property. We should:

• Add a new guard, KindSpecified, to require a DateTime argument to have kind that is either Local or Utc, so people can force callers to think about the source of their time values and specify the kinds explicitly.
• Add non-generic overloads to Equal, NotEqual, Min, Max and InRange that acc

(issue corresponding to review suggestion here)

CMAKE_CXX_FLAGS is used to configure compiler warnings in cmake as part of the testing procedure, (following the this advice). I am not aware of a warning API in cmake and I know of no option that does not involve passing e

1. glob srcPath
2. import doczrc extract menu
3. transform each file stripping the top config section append in the order provided by doczrc.menu
4. run the complete file through markdown-toc and append that to the top.
5. write the file to the outputPath

When the .NotDefault() Precondition fails, the exception message is:

System.ArgumentException : Bookedtime
"Parameter name: Value must have default value!"

Why would we say that it must have a 'default value' when the condition is that it is NOT the default value?

I think something like:
"Parameter name: Must have a value other than the system default"

Instead of writing tg.throwIf(tg.isNot(tg.isString)), it would be nicer to write tg.throwUnless(tg.isString).