NOTE PURCHASE AGREEMENT AMONG BPC ACQUISITION CORP. AND GOLDMAN, SACHS & CO. as Initial Purchaser AND GSMP 2006 ONSHORE US, LTD. GSMP 2006 OFFSHORE US, LTD. GSMP 2006 INSTITUTIONAL US, LTD. GS MEZZANINE PARTNERS 2006 INSTITUTIONAL, L.P. as Subsequent...