Bug ZK-2472: zk_download iframe creates scrollbar
Bug ZK-2488: Caption component with label renders incorrectly
Merge remote-tracking branch 'Chunfu/B70-ZK-2488'
Merge branch 'B70-ZK-2472' of https://github.com/hanhsu/zk
add missing javadoc
Merge pull request #170 from VincentJian/master

add missing javadoc