Merge pull request #12 from ChrisBoesch/master

merging back
feat(topics): video assosiation prototype

Signed-off-by: A. Prooks <aprooks@live.ru>
feat: video can be added to topic

preview, controller not finished and no tests

Signed-off-by: A. Prooks <aprooks@live.ru>
chore: Build and screenshots

Signed-off-by: A. Prooks <aprooks@live.ru>
Merge pull request #51 from aprooks/feature/topicAndVideos

preview of video added to topics