add iframe-autoheight-using-postMessage.js to handle dynamic-height iframes

iframe-autoheight-using-postMessage.js is a very simple js code
which handles message "iframeHeight XXX" sent by iframe to uportal using postMessage

This allows an iframe to tell uportal its height to get rid of vertical scrollbars for the iframe.
I18N ESUP : 'Vous Êtes Connecté(E) En Tant Que ' -> 'Bienvenue'
test parameters just for my git fork of esup-uportal
personal parameters for testing
UP-3488: test : improve JpaPortletDaoTest by storing portlet preference with non-ascii characters
UP-3488: use @Type(type = org.hibernate.type.StringClobType) for @Lob type - postgresql fix with CLOB
personnal parameters
postgresql 9.1
port 5432 pour postgres : n'utilise plus pgpool2 en local en fait