Squashed 'mass_storage/' changes from 4482fe261..ce1383d0e

ce1383d0e Merge Mass storage updates and fixes
4b56888b7 update readme
9a45453e0 update ofw plugins, add new plugins
REVERT: 4482fe261 Clock, music player, snake game from firmware repo (#19)
REVERT: 4b0ea1f07 Mass storage: deadlock fix (#22)
REVERT: 0a8fc7e77 Mass storage 1.1 (#18)
REVERT: 1d53f6851 Added fap_version field to all apps (#15)
REVERT: 380a4e3d6 Add descriptions for all the faps (#13)
REVERT: b6967eb23 Manifest cleanup
REVERT: 441c5d09c Added app descriptions (#8)
REVERT: 7f35fcc6f Screenshots for app catalog (#6)
REVERT: ae2d0843a [FL-3432] USB storage app (#1)

git-subtree-dir: mass_storage
git-subtree-split: ce1383d0ead4b17733852827909e024fc04c4071