* Shares nudge higher, Italy strong after Renzi election win* Euro lifts off 3-month low caused by ECB easing bets* Poroshenko&aposs apparent win raises hopes of political stability in UkraineBy Marc JonesLONDON, May 26 (Reuters) - Italian assets surged and German shares hit all-time highs on Monday as solid election showings by pro-European forces in both countries provided an antidote to Eurosce