HLS video handling/storage/state refactor (#151)

* WIP with new transcoder progress monitor

* A whole different WIP in progress monitoring via local PUTs

* Use an actual hls playlist parser to rewrite master playlist

* Cleanup

* Private vs public path for thumbnail generation

* Allow each storage provider to make decisions of how to store different types of files

* Simplify inbound file writes

* Revert

* Split out set stream as connected/disconnected state methods

* Update videojs

* Add comment about the hls handler

* Rework of the offline stream state.  For #85

* Delete old unreferenced video segment files from disk

* Cleanup all segments and revert to a completely offline state after 5min

* Stop thumbnail generation on stream stop. Copy logo to thumbnail on cleanup.

* Update transcoder test

* Add comment

* Return http 200 on success to transcoder. Tweak how files are written to disk

* Force pixel color format in transcoder

* Add debugging info for S3 transfers. Add default ACL.

* Fix cleanup timer

* Reset session stats when we cleanup the session.

* Put log file back

* Update test

* File should not be a part of this commit

* Add centralized shared performance timer for use anywhere

* Post-rebase cleanup

* Support returning nil from storage provider save

* Updates to reflect package changes + other updates in master

* Fix storage providers being overwritten

* Do not return pointer in save. Support cache headers with S3 providers

* Split out videojs + vhs and point to specific working versions of them

* Bump vjs and vhs versions

* Fix test

* Remove unused

* Update upload warning message

* No longer valid comment

* Pin videojs and vhs versions

core/status.go

@@ -1,12 +1,7 @@
 package core
 
 import (
-	"time"
-
-	"github.com/owncast/owncast/config"
-	"github.com/owncast/owncast/core/ffmpeg"
 	"github.com/owncast/owncast/models"
-	"github.com/owncast/owncast/utils"
 )
 
 //GetStatus gets the status of the system
@@ -25,40 +20,6 @@ func GetStatus() models.Status {
 	}
 }
 
-//SetStreamAsConnected sets the stream as connected
-func SetStreamAsConnected() {
-	stopCleanupTimer()
-
-	_stats.StreamConnected = true
-	_stats.LastConnectTime = utils.NullTime{time.Now(), true}
-	_stats.LastDisconnectTime = utils.NullTime{time.Now(), false}
-
-	chunkPath := config.PublicHLSStoragePath
-	if usingExternalStorage {
-		chunkPath = config.PrivateHLSStoragePath
-	}
-
-	if _yp != nil {
-		_yp.Start()
-	}
-
-	ffmpeg.StartThumbnailGenerator(chunkPath, config.Config.VideoSettings.HighestQualityStreamIndex)
-}
-
-//SetStreamAsDisconnected sets the stream as disconnected
-func SetStreamAsDisconnected() {
-	_stats.StreamConnected = false
-	_stats.LastDisconnectTime = utils.NullTime{time.Now(), true}
-	_broadcaster = nil
-
-	if _yp != nil {
-		_yp.Stop()
-	}
-
-	ffmpeg.ShowStreamOfflineState()
-	startCleanupTimer()
-}
-
 // SetBroadcaster will store the current inbound broadcasting details
 func SetBroadcaster(broadcaster models.Broadcaster) {
 	_broadcaster = &broadcaster