Validation

[Wopple]

Public API changes:

• removed LocationData
• removed LocationType
• locations are replaced with URIs, paths are relative URIs
• added throws PlaylistException to parsing and writing
• builders no longer perform validation
• added PlaylistValidation
• hasUri() methods now return true on an empty string
• added IFrameStreamInfo
• added IStreamInfo implemented by StreamInfo and IFrameStreamInfo
• added StreamInfoBuilder implemented by StreamInfo.Builder and IFrameStreamInfo.Builder
• added getIFramePlaylists() to MasterPlaylist
• MediaData.getCharacteristics() is now guaranteed non-null
• removed PlaylistData.isIframesOnly()
• added parsing of the new FRAME-RATE attribute to StreamInfo and IFrameStreamInfo
• removed some ParseExceptionType enums, now a part of the validation component

Internal changes:

• tag parsers no longer use inheritance