Rename Mass.js to ISLCMass.js

[jessegreenberg]

Considering the naming of types in this repo and the fact that there are other "Mass" types for other sims in the project, I might recommend renaming Mass to ISLCMass. Thoughts @mbarlow12?

[jessegreenberg]

For #30

[mbarlow12]

I don't think I agree, and I'm not sure that it belongs in the common repo. I'd vote to either 1) move it to both GFL & GFLB or 2) move it to GFL and inherit it in GFLB. They both have some trade offs, but I think it's a cleaner code organization/hierarchy.

[jessegreenberg]

They both have some trade offs, but I think it's a cleaner code organization/hierarchy.

Can you elaborate? What is the benefit of having GFLB dependent on GFL? At the moment all three sims are only dependent on inverse-square-law-common.

[jessegreenberg]

Ah, maybe you were thinking types in ISLC should be agnostic of mass or charge?

[jessegreenberg]

If that is the case I do prefer option 2 of #31 (comment) to avoid duplicated code. @mbarlow12 would you mind working on this transition if you think it is best? gravity-force-lab will need to be added as a dependency to gravity-force-lab-basics in package.json.

[mbarlow12]

@jessegreenberg sure thing.