[web] webcam working on Firefox 22+ (& localization)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26289 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Clean code

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26294 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e