added documentation to Presentz.coffee
made findVideoPlugin and findSlidePlugin private and static
added documentation to Video.coffee
exported every class to the "presentz" namespace
added documentation to Youtube.coffee, SlideShare.coffee and SlideShareOEmbed.coffee
moved strict.coffee to root folder so to easily run docco
reviewed Cakefile to create a joined temporary version of presentz sources
added documentation to remaining .coffee files
releasing 1.2.2. Minor fixes and reference doc