Widget Button Toolbar - Initial creation and base files

- HTML template with core layout and structure in place
- Directive added, functionality within `link` function to come
- e2e test HTML file, full layout and structure in place with primary sources imported, test app module and controller created
- e2e test file added, actual tests to come
Merge pull request #142 from stulees/feature/initial-settings-toolbar

Widget Button Toolbar - Initial creation and base files