Featured image GLM style, order subsections,etc

Featured image GLM style, order subsections,etc

- Featured image : now retrieved from Featured image set for
    home page in admin.
- Featured image : gut the current implementation and use what we
    always do on our other themes (glm_get_header) with some edits.
- Subections are now ordered by menu order
- Clicking the active tab no longer hides its content.