Issue 790 param not recognized

[valentinsulzer]

Description

Add fuzzy dict and raise errors if a parameter is updated that wasn't previously defined (so users don't think they've updated them when they haven't)

Fixes #790
Fixes #662

Type of change

Please add a line in the relevant section of CHANGELOG.md to document the change (include PR #) - note reverse order of PR #s. If necessary, also add to the list of breaking changes.

• New feature (non-breaking change which adds functionality)
• Optimization (back-end change that speeds up the code)
• Bug fix (non-breaking change which fixes an issue)

Key checklist:

• No style issues: $ flake8
• All tests pass: $ python run-tests.py --unit
• The documentation builds: $ cd docs and then $ make clean; make html

You can run all three at once, using $ python run-tests.py --quick.

Further checks:

• Code is commented, particularly in hard-to-understand areas
• Tests added that prove fix is effective or that feature works

[codecov]

Codecov Report

Merging #796 into master will decrease coverage by 0.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #796      +/-   ##
==========================================
- Coverage   98.49%   98.47%   -0.02%     
==========================================
  Files         179      181       +2     
  Lines       10133    10156      +23     
==========================================
+ Hits         9980    10001      +21     
- Misses        153      155       +2

Impacted Files	Coverage Δ
pybamm/parameters/parameter_values.py	100% <ø> (ø)	⬆️
pybamm/models/submodels/particle/base_particle.py	97.29% <ø> (ø)	⬆️
.../models/submodels/thermal/isothermal/isothermal.py	100% <100%> (ø)	⬆️
pybamm/simulation.py	90.58% <100%> (-2.34%)	⬇️
pybamm/solvers/solution.py	97.87% <100%> (-1.22%)	⬇️
...odels/full_battery_models/lithium_ion/basic_spm.py	100% <100%> (ø)
pybamm/processed_variable.py	96.85% <100%> (-0.46%)	⬇️
...models/full_battery_models/lithium_ion/__init__.py	100% <100%> (ø)	⬆️
...odels/full_battery_models/lithium_ion/basic_dfn.py	100% <100%> (ø)
... and 4 more

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[TomTranter]

Hey @tinosulzer what is the process for adding new parameters now?
Also... fuzzywuzzy is kinda racist slur in Britain... would be better to not use this package imho

[valentinsulzer]

Same process as before, but if you try to update a parameter that didn't exist before there will be an error that can be overwritten by setting an extra flag in update.
That is unfortunate for the name, will look for different package.