New sanbox experiments

[pat-schmitt]

Here I am adding three different glacier states per sandbox geometry (equilibrium, retreating and advancing).

[coveralls]

Pull Request Test Coverage Report for Build 6038881881

• 135 of 190 (71.05%) changed or added relevant lines in 9 files are covered.
• 10 unchanged lines in 2 files lost coverage.
• Overall coverage increased (+0.9%) to 65.436%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
agile1d/core/cost_function.py	7	8	87.5%
agile1d/sandbox/define_idealized_experiment.py	22	24	91.67%
agile1d/sandbox/run_idealized_experiment.py	0	3	0.0%
agile1d/sandbox/individual_experiment_dashboard.py	0	10	0.0%
agile1d/sandbox/graphics.py	0	39	0.0%

Files with Coverage Reduction	New Missed Lines	%
agile1d/sandbox/individual_experiment_dashboard.py	4	0.0%
agile1d/sandbox/graphics.py	6	0.0%

Totals
Change from base Build 5938081839:	0.9%
Covered Lines:	2268
Relevant Lines:	3466

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💛 - Coveralls