Cleanup code

[tylervz]

Add an .editorconfig file, add final newlines to many files, convert tabs to spaces in some Groovy files, make the indentation consistent across files.

Change implicit return statements in Groovy code to be explicit return statements.

[codeconsole]

why the explicit return statement change?

[tylervz]

why the explicit return statement change?

It’s just a stylistic preference. I think it makes the code easier to read. But I can take them out if most people prefer implicit returns.