Fixed processing of model config file.

[nwittler]

Bug
Instantiating models from configs did not perform some required checks performed when creating the model interactively.

Fix
Both use cases now go through the same checks.

Misc
This also required to update some test configs to avoid duplicate names.

[codecov]

Codecov Report

Merging #103 (5ff764c) into dev (b6dd98f) will increase coverage by 0.07%.
The diff coverage is 86.36%.

@@            Coverage Diff             @@
##              dev     #103      +/-   ##
==========================================
+ Coverage   57.32%   57.39%   +0.07%     
==========================================
  Files          35       35              
  Lines        5279     5300      +21     
==========================================
+ Hits         3026     3042      +16     
- Misses       2253     2258       +5     

Impacted Files	Coverage Δ
c3/model.py	73.17% <86.36%> (+0.82%)	⬆️
c3/libraries/chip.py	45.41% <0.00%> (-0.20%)	⬇️
c3/optimizers/c1.py	73.73% <0.00%> (+1.01%)	⬆️
c3/libraries/algorithms.py	19.23% <0.00%> (+1.71%)	⬆️

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[lazyoracle]

Not waiting for the codeclimate analysis since that seems to have run into errors. Everything else looks good!

[nwittler]

Did a tiny bit to reduce complexity in c/model.py. Since a rework is in order for the model and propagation libraries in #99, this is postponed.

[fedroy]

Merging approved, however we could use the codecov warnings to add tests in a timely manner

[fedroy]

these codecov warning are useful for adding specific tests