Compilation errors are "hard" to debug

[gdamore]

Because of the crazy amount of work we do with the C preprocessor, it can be quite confusing to debug compilation errors when compiling test programs using C Convey.

I'm not sure how we can make this simple. The truth is that the CPP is an ugly beast, and its too bad we have to use it -- but this is the nature of trying to emulate lambda functions in C... When it works, it's terrifically beautiful. When it fails, its terrifically ugly.