Add and update korean translations

As usual, Thanks to Mr. Min-Ho Park.
dmix: AS Gradle plugin update.
Sticker: Javadoc update.
MPDConnection: Move setMPDVersion to CommandResult.
MPDConnection: Use the TAG of the abstract method.
MPDConnection: Suppress the remainder false positive error logging.
Bump version
Merge branch 'release/1_07_rc2'
Merge tag '1_07_rc2' into develop

1_07_rc2