Merge pull request #6 from jonnywilliamson/master

Small fix for icon generation for imagick
Video fixes

Changes file size limit to 20MB and now setting the proper file type on
upload response
Deleted unused python code
Fixed icon generation
Add videothumbnail
Add Videothumbnail call.
Added and verified all approved media file types.
Changed max file size (Mb) for each media type to an easy to set number if user needs to change. Currently 5Mb for Images, 10Mb for Audio and 20Mb for Video.