fix #1032 viewport sizes updated when the first autoresizable element is registered
viewport sizes are now also updated when the first autoresizable element is registered, and not only when Layout singleton is loaded or a resize is done.
fix #1048 jshint es3 parameter set to true (old browsers support)
feat #1040 Check the skin when normalizing it

This commit updates the version of atpackager, and updates
the configuration of the ATNormalizeSkin visitor to check
the skin properties while normalizing them. In case a skin
property is not correct (i.e. if it does not match the
corresponding bean in aria.widgets.AriaSkinBeans), the
build fails.

Close #1040