Major simplification of project files; code cleanup

[TacoTheDank]

1st commit

• Deleted .iml files that fill the commits with noise
• Had to delete the screenshots that were making git clone fail because of the ":" in the file names (use commas in the future, it's closest I guess; the screenshots were super old anyway)

2nd commit

• Updated gradle wrapper using ./gradlew wrapper --gradle-version 5.6.4 --distribution-type all in git bash

3rd commit

• Major reconfiguration of the project files to make it much simpler
• Update Android Studio 3.5.1 to 3.5.2

4th commit

• Added an .editorconfig
• Reformatted all files to match the .editorconfig (made it spaces, because the res files were using spaces, and it's either ALL tabs or ALL spaces)
• (Included some import cleanup)
• (No actual code changes)

5th commit

• Some automatic code cleanup by Android Studio

6th commit

• Converted anonymous classes to lambda expressions
• Narrowed down access modifiers

7th commit

• Migrated to AndroidX

8th commit

• Deleted changes folder and combined all change files into a CHANGELOG.md in the root folder
• Added a LICENSE file
• Changed README.md to reflect project changes
• Added app location badges
• Updated strings (and fixed an oopsie I made in the 3rd commit)

[mannd]

Thanks. I will look at this and merge if all goes well. The original code was rather old and somewhat neglected. Thanks for your interest.

[mannd]

Merged.