Minor code cleanup

[Alan19]

• Extract commonly used keys into constants
• Use non-deprecated functions and constants
• Delete duplicate models in the resources folder that is already generated
• Finish localization

[Alan19]

This addresses #13 and #10

[Alan19]

Files were reformatted in this PR, hiding whitespace in the diff would make it easier to review

[Alan19]

Files were reformatted in this PR, hiding whitespace in the diff would make it easier to review

This might not be a good idea, it seems to make some code changes misleading by making it look as if code was deleted when it was not