Allow subtitle downloading (#11)

* Added subtitle options to media profile model

* Updated media profile form

* Adds subtitle-based options in options builder

* Updates metadata parser to include subtitles

* Adds subtitle_filepaths to media_item

* renamed video_filepath to media_filepath

* Added more fields to media profile show page

.iex.exs

@@ -0,0 +1,14 @@
+alias Pinchflat.Repo
+
+alias Pinchflat.Tasks.Task
+alias Pinchflat.Media.MediaItem
+alias Pinchflat.Media.MediaMetadata
+alias Pinchflat.MediaSource.Channel
+alias Pinchflat.Profiles.MediaProfile
+
+alias Pinchflat.Tasks
+alias Pinchflat.Media
+alias Pinchflat.Profiles
+alias Pinchflat.MediaSource
+
+alias Pinchflat.MediaClient.{ChannelDetails, VideoDownloader}