Log verbosity level

[pshriwise]

There are still a few direct calls to std::cout hanging around. I think a setting for the verbosity of log output would be useful at some point so we can throw those at a logging function/macro with a high verbosity level if desired so we can still display them easily if desired.

[natevm]

for example, GeomType currently uses a std::cout in the constructor / destructor. That could instead be piped through some function printing more / less depending on verbosity.

I'm wondering if it makes sense to do anything other than "verbose / not verbose". like, low vs medium vs high.

Could also setup warnings, error, and info or something like that.

[pshriwise]

Yeah I think having different classes of messaging is another solution. I'm good w/ that.