added the parameter oneAlwaysBigger to videodock module on config.xml. if oneAlwaysBigger is true, one window will always be bigger on videodock layout

 loop trying to determine if cam is used by another app

added a layout parameter for the video dock on config.xml; the layouts could be none (no action on click), smart (better adjustment positioning the big window on the top or on the right side) or hangout (the big window will always be on top)

Conflicts:
	bigbluebutton-client/src/org/bigbluebutton/util/i18n/ResourceUtil.as

 - add param to prevent locales from being cached

 - hide push to talk for viewer if locked by moderator

 to access and modify users and conference attributes

 - fix problem where listners window will display wrong name as data gets cached in listenerItem. When a user leaves and joins
   the old value of that listener item gets displayed

 check if shared object is null as user may have left and will result an NPE when sending private chat