Make OpenSkin PEP8 compliant

[Luuk]

No description provided.

[Luuk]

Changed all variable and function names that were highlighted by Pycharm as not in line with PEP8.

→ <<cset 5a868090084c>>

[Luuk]

Refs #817

Now pushing to the right branch.

PEP8 changes to skindose files. Some additional changes. All indicated by Pycharm.

→ <<cset d7a60518de86>>

[Luuk]

Refs #817

Removed some comments in calc_exp_map.py as they are not applicable anymore.

Updated geomclass.Phantom to geomclass.PhantomFlat and removed depth argument.

→ <<cset 97920d6854f2>>

[Luuk]

Partially resolved Codacy issues.

Refs #817

→ <<cset 31878e514668>>

[Luuk]

Something went (very) wrong with refactoring. Now fixed it.

refs #817

→ <<cset adab9b6fb567>>

[Luuk]

Some other Codacy issues.

Added item to changes.rst

Refs #817

→ <<cset 39a14f8fd56e>>

[Luuk]

Last Codacy fix for now.

Manually tested a number of skin dose maps.

Refs #817

→ <<cset 4506d8131ee1>>

[Luuk]

Some additional Codacy issues addressed (before adding human reviewers).

Refs #817

→ <<cset 36888787c5ea>>

[Ed McDonagh]

Merged in Issue817OpenSkinPEP8Compliant (pull request #358)

Fixes issue #817 make OpenSkin PEP8 Compliant

Approved-by: Ed McDonagh

→ <<cset bbf480af6e10>>