refactor(all): enforce one-to-one file-module relationship

Use a single file for each module (do not split a module across multiple
files), as per ngbp guidance

Change top-level module name from ozpWebtopApp to ozpWebtop

Closes #262
Merge pull request #263 from ozone-development/issue-262-one-file-per-module

refactor(all): enforce one-to-one file-module relationship