Add bounds check for continuous types

[micahjohnson150]

• inicheck version: 0.4.2

It would be nice to instruct users that their value cannot exceed certain limits.

e.g. users must choose an azimuth so we demand a number between 0-360

or e.g users should enter a max albedo which would have to be 0-1

The approach might be add two new fields to the masterconfig for min max, assume none and none. In the check config function we could just look for it.