update: translations.

Signed-off-by: liuyanghejerry <liuyanghejerry@126.com>
add: option to delete disk cache;
update: translations.

Signed-off-by: liuyanghejerry <liuyanghejerry@126.com>
add: url encoder and decoder.

Signed-off-by: liuyanghejerry <liuyanghejerry@126.com>
bugfix: issue#21.

Signed-off-by: liuyanghejerry <liuyanghejerry@126.com>
add: Join room via URL.

Signed-off-by: liuyanghejerry <liuyanghejerry@126.com>
update: translations.

Signed-off-by: liuyanghejerry <liuyanghejerry@126.com>