capture.cpp: bug fixe and some improvements.
capture.cpp: bug fixe and some improvements.

Added error checking when setting camera value.
Adjusted cutoff point on when to display an exposure length as one or two values.
Changed log levels on some output.
Histogram size now is resized when binning is used (fixes a bug).
Added error checking for exposure lengths too long.
Formatted cvText() calls so they aren't so wide and hard to read.
Minor formatting changes.
thomasjacquin/allsky,thomasjacquin/allsky,thomasjacquin/allsky