Issue 964 show params

[rtimms]

Description

Adds an attribute parameters to the model that lists all of the parameters (similar to the attribute input_parameters). Also add parameters attribute to geometry. Now users can see which parameters a model requires by doing model.parameters (before it is processed). Note: this is different to model.param which is the module of parameters that model uses.

Also removes parameters related to tabs that aren't correct for a given set (they were inadvertently copied from the Marquis2019 set)
Fixes #964

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

[valentinsulzer]

Looks great, cheers.
If we add more of these methods to query the model we should think about making it a single function to reduce repeated code, but it's fine for now

[codecov]

Codecov Report

Merging #993 into develop will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff            @@
##           develop     #993   +/-   ##
========================================
  Coverage    97.55%   97.56%           
========================================
  Files          233      233           
  Lines        12083    12106   +23     
========================================
+ Hits         11788    11811   +23     
  Misses         295      295           

Impacted Files	Coverage Δ
pybamm/geometry/geometry.py	98.67% <100.00%> (+0.13%)	⬆️
pybamm/models/base_model.py	98.81% <100.00%> (+0.03%)	⬆️

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