Fix Celcius Behavior

[jsantner]

Celcius (and Fahrenheit) temperatures were not read correctly, creating errors. Previously, a temperature such as 50 degC would be read by multiplying 50 and degC, giving an error because a relative unit like degC cannot be multiplied. This pull request fixes the issue, and adds a test involving Celsius. I created a new .yaml file for this test - should I modify one of the existing files, like testfile_rcm.yaml, instead?

I apologize for the messy commits and reversions of commits. I was working on a separate issue at the same time, but that issue deserves more work (and its own pull request) so I reverted those commits.

@pr-omethe-us/chemked

[jsantner]

Sorry, I checked this against the chemked file I was working with, and didn't have any problems. But, my changes don't pass other tests. I should have run all tests before the pull request. Now I know how to run travis tests without a pull request for next time...

Anyway, I'll work on it tomorrow to make this more generally applicable so that it can pass the tests.

[codecov[bot]]

Codecov Report

Merging #114 into master will not change coverage. The diff coverage is 100%.

@@          Coverage Diff          @@
##           master   #114   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           4      4           
  Lines         966    975    +9     
  Branches      226    226           
=====================================
+ Hits          966    975    +9

Impacted Files	Coverage Δ
pyked/chemked.py	100% <100%> (ø)	:arrow_up:
pyked/validation.py	100% <100%> (ø)	:arrow_up:

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[jsantner]

I altered my change so that it only applies when dealing with celsius and fahrenheit units, to avoid issues with "unusual" units, like 999 / seconds. What do you think?

[bryanwweber]

@jsantner Rather than reverting commits, it would be better to rebase and drop them. Then you can git push -f to this branch to update the PR.

[jsantner]

@bryanwweber I had been using GitHub Desktop, which doesn't seem to allow rebasing. I have the command-line interface for git now, and rebased as you asked, with some minor hiccups caused by conflicts between the command line and desktop.