Enhance >check

[GregUtas]

Extend the Warning enum to support any of the following:

• [ ] use of typedef (for conversion to using type alias)
• [ ] data member has set function but class writes directly to the member
• [ ] packing an enum into a field that cannot hold +/- the largest absolute value of an enumerator (need to resolve ClassData.width_ to a constant)
• [ ] assigning the result of new to a stack or member pointer instead of a smart pointer
• [ ] redefining an inherited default argument
• [ ] #include only required because of inlines in header (would need to modify GetUsages to track symbols that only appeared in inlines)
• [ ] function returns a value that is never used
• [ ] byte-sized non-char field that is displayed as a character instead of numerically (might be detected by checking for invocations of ostream::operator<< in Function.WasCalled)
• [ ] member omitted by Display function
• [ ] default argument specified by definition rather than declaration (default needs to be seen by the compiler at the point of usage, so the definition would probably have to be in a header to have any effect)

And the following, which are only for formatting:

• [ ] using statement not sorted in alphabetical order
• [ ] single rule (//---...) not used between function definitions in same class
• [ ] double rule (//===...) not used between function definitions in different classes