Kwplayer

* Feature: add OSD lyric
* Feature: add some ations
* Show playlist tab on startup
* i18n updated

* Fixed: failed to load images in Artist tab; https://github.com/LiuLang/kwplayer/issues/53 and https://github.com/LiuLang/kwplayer-packages/issues/50

* Fixed: reset vscrollbar in ScrolledWindows
* Fixed: NoneType is not iterable in MV tab
* Fixed: call update_liststore_images in background thread
* Fixed: Catch UnicodeDecodeError in json_loads_single
* Fixed: range() arg 3 must not be zero in Lrc tab
* Fixed: check tree_iter type in PlayList tab
* Feature: add log module
* Feature: add caching monitor
* Feature: display caching speed
* GtkAdjustment removed in Preferences dialog
* Change default audio type from 128k to 320k

* Fixed: replace aac format with 128k mp3
* Fixed: emit can-play signal
* Automatically load next page when curr_song >= 10
* Fixed: lrc text size reset to 4pt in gtk3.14
* Fixed: list index out of range in Radio tab
* Fixed: do not fetch MV info while playing radio

* KARAOKE mode removed
* Support 320k mp3 and flac format
* Support KuwoDES
* Set http connection timeout to 30s
* Fixed: stop player when network error occurs
* Fixed: PlayList has no attribute `add_song_to_favorite`
* Rename `mutagenx` with `mutagen`
* Automatically hide toolbar and notebook on lrc tab
* i18n updated

* add popup menu to playlist
* rebuilt search-page
* store media data to temp files
* fixed: failed to locate that song which is being played; reported by wangjiezhe
* i18n updated