CRM_Contribute_BAO_Contribution::getSoftContributionTotals() returns formatted currency string (should return float)

CRM_Contribute_BAO_Contribution::getSoftContributionTotals() returns a formatted currency string. This makes it very difficult to use for anything other than printing. Formatting the value into a Money format should be done at the template level.

NOTE: We need to pass the currency from the related contribution records into the template so total and average are properly formatted. This breaks down if the soft contributions for a given contact are in > 1 currency. However, this problem existed prior to this change (since we are grabbing a single SUM and AVG aggregate).