Fixes Bug 1046329 - Resources Competencies: markup should be more semantic.
Merge pull request #915 from gesa/1046329/semantic-competencies

Fixes Bug 1046329 - Resources Competencies: markup should be more semantic.
Fixes Bug 1046746 - Adding top margin to captions below thumbnails.
Fixes Bug 1046746 - Using rems instead of ems.
Merge pull request #916 from vazquez/1046746/spacing-figcaption

Fixes Bug 1046746 - Adding top margin to captions below thumbnails.