Ice is not considered in any cloud fraction calcuations in crm_stat

Created by: wgustafson

We need to revamp the handling of cloud fractions and cloud masking within crm_stat. Currently, cloud ice isn't even passed into the routine. We need to take the ice into consideration. I think it currently isn't done to imply a low-cloud fraction. But, we can independently calculate low, mid, and high cloud fractions that take ice into account. This would be a better way to handle this.

While we're at it, we can also add output for ice water content and profile averages of frozen condensate. The cldtot variable should be turned into a true "total" for liquid+frozen.