LONDON (Reuters) - The euro rose and European shares climbed to a near three-week high on Tuesday after global lenders clinched a deal to reduce Greek debt and disburse the country's next aid installment. After 12 hours of talks, the lenders agreed measures to cut Greek debt to 124 percent of gross domestic product by 2020, and promised further steps to lower it below 110 percent in 2022. European shares on the FTSEeurofirst 300 opened up 0.5 percent following the deal, with London's FTSE 100 , Paris's CAC-40 and Frankfurt's DAX between 0.5 and 0.9 percent higher. ...