Merge pull request #420 from SenecaCDOT-BigBlueButton/add-layout-translation

bigbluebutton-client/locale/en_US/bbbResources.properties

bigbluebutton-client/resources/config.xml.template

bigbluebutton-client/resources/prod/layout.xml

...rg/bigbluebutton/modules/layout/managers/LayoutManager.as

.../org/bigbluebutton/modules/layout/views/LayoutsCombo.mxml

...on-client/src/org/bigbluebutton/util/i18n/ResourceUtil.as