refactor profile vc to be a TVC, because I didn’t like how much space was lost with the old style
initial implementation of RYPlayControl object
more progress on table layout
fix bugs on new profile vc table (esp. height)
setup riff streaming with new profile vc, and PlayControl animations
finish initial implementation of RYPlayControl
Replace riff cell for newsfeed, refactor RiffStreamingCoreVC and use in profile again