Use close comparisons in CAPE and CIN.
Use close comparisons in CAPE and CIN.

There were edge cases where greater/less than or equal to would suffer from
precision issues and drop an extra point in the sounding. Modify them to use
our approximate comparisons.

jrleeman/MetPy,dopplershift/MetPy,jrleeman/MetPy,dopplershift/MetPy,ahaberlie/MetPy,ShawnMurd/MetPy,Unidata/MetPy,Unidata/MetPy,ahaberlie/MetPy