Merge pull request #103 from jerrywell/6.5

Bug ZK-2389: Append popup component to Hlayout throws JavaScript error
Bug ZK-2160: menupopup shifts position when timer event occurs
add release date
1. Fixed jsdoc issue copied from master branch
release 6.5.7
update version to 6.5.8
Bug ZK-2401: Navigate textboxes in listheader by tab key break frozen scroll behavior
* Bug ZK-2407: XSS Vulnerability in textbox.setValue()
* Refixed for ZK-2116
refine
Bug ZK-2402: In IE8, clicking the "up/down" arrow of timebox does not always trigger an onChange event
Bug ZK-2404: In IE7, timebox cannot keep updating minutes/seconds/am/pm values by repeatedly clicking the "up/down" arrows