Merge branch 'release-6.0.2'
Allows a blog URL for "redirectUrl". bugid:111411

* Allows an external URL to "redirectUrl" if that is the URL of any published blog.
* Returns "oneTimeToken" from "/authentication" if an external URL was given for "redirectUrl" parameter.
* Enable to get "sessionId" and "accessToken" from "/token" using "oneTimeToken".
Update mt-data-api.js.

Use ontTimeToken to get access token. bugid:111411
Update mt-data-api.js.

Process one time token in initializing by default. bugid:111411
Suppress warnings.

*  Any templates for preview had been loading a not exist image.
Do not catch E_WARNING warnings in dynamic publishing. bugid:110627
Fix failed test. bugid:81259
Compiling roles, should check from the longest bugid 111534
Compiling roles, should check from the longest dynamic, bugid 111534
improved PHP code style bugid 111534
AssetCount tag should not count sub-assets bugid 80745
fixed site_stats widget tooltips bugid 111364
Pick up command line from process table. bugid:111271
Validate initial user's values by MT::CMS::User::save_filter. bugid:108187
Skip validating uniqueness of name for the first user. bugid:111395
Apply "class" filter even for blog selector. bugid:111419
encoding mt:ErrorMessage in comment_response tmpl bugid 111513
Change Plugins and Themes directory url. bugid:111410
encoding mt:ErrorMessage in comment_response tmpl bugid 111513
Clear any preview file when saving entry, if PreviewInNewWindow is ON. BugzID: 111444