mpv-discordRPC version 1.4

! Update:
! * `README.md`
! * `mpv-discordRPC_catalogs.lua`
! * `images/`
! * `mpv_discordRPC.conf`
! * `mpv-discordRPC_lua-discordRPC.lua` (lua-discordRPC library)
! * Configuration directory because of deprecated

+ Added:
+ * `images/`
+ * Detections for protocol(http, https), YouTube, Crunchyroll, SoundCloud, and LISTEN.moe
+ * Active/inactive toggle
+ * License
+ * Script info