v1.0.22

auto detect subtitle files when playing media from external storage

* this is a fallback strategy that only applies
  when no captions have been explicitly specified

* this is especially helpful when videos are added to the queue
  by indirect means, other than the HTTP endpoint
  - Intent
  - directory index
  - .m3u playlist

* follows the defacto standard naming convention,
  whereby the name of a subtitle file
  begins with the name of its associated media file
  - can optionally include nested file extensions,
    which are typically used to denote the language;
  - ex:
      video.mp4
      video.vtt
      video.english.srt

v1.0.21

improve intent-filter support for absolute directory paths

v1.0.20

add intent-filters to support playing media opened through other apps

v1.0.19

fix: process files in alphabetic order when reading directory content

v1.0.18

add ability to recursively search for media files in dir on receiver

v1.0.17

add ability to play all media files in storage directory on receiver

v1.0.16

add ability to play .m3u playlist from external storage by file path

v1.0.15

add ability to play media from external storage by absolute file path

v1.0.14

DONE: update text sync dialog - add support for OnValueChangeListener

v1.0.13

WIP: update text sync dialog - add support for negative values