[#16] Users can create videos and consult media cuts

Embedded youtube video with start and end time taglib

Page example to display Media Cuts summary

User can display his media cuts, create and show a video

List all media cuts

Time validation in progress

Post merge

[#16] start/end time validation

[#16] VideoSpec

[#16] Video controller/service spec

Video taglib spec

MediaCut spec

Fixed a few codenarc errors
Merge branch 'MediaCutManagement/UserWantsToConsultHisMediaCuts/3' into develop