igitur/quantlib — pull request #1 by igitur (2014-06-10 11:42:32+00:00)
Title: Implement CPIBondHelper

Hope I created this PR correctly. The PR for the excoupon and paymentcalendar parameters for CPI bonds is a prerequisite, so I based this PR on my own `excoupon_and_payment_calendar_parameters_for_cpi_bonds` branch. Hope it's OK.