Update checkpoints.cpp
Update checkpoints.cpp

Added checkpoints 50000 - 50008
mitchellcash/paycoin,IngCr3at1on/paycoin,IngCr3at1on/paycoin,jwrb/paycoin,Iamhumanareyou/EmprendeCoin,PaycoinFoundation/paycoin,sengmangan/XPAY,jwrb/paycoin,PaycoinFoundation/paycoin,coinkeeper/2015-06-22_18-53_paycoin,ligerzero459/paycoin,sengmangan/XPAY,ligerzero459/paycoin,JoseBarrales/mlnc,coinkeeper/2015-06-22_18-53_paycoin,mitchellcash/paycoin,thommyV91/Suck-a-Coin,coinkeeper/2015-06-22_18-53_paycoin,thommyV91/Suck-a-Coin,Iamhumanareyou/EmprendeCoin,sengmangan/XPAY,TheNameIsNigel/paycoin,JoseBarrales/mlnc,ligerzero459/paycoin,lendcoinfundation/lendcoin,mitchellcash/paycoin,IngCr3at1on/paycoin,PaycoinFoundation/paycoin,jwrb/paycoin,coinkeeper/20150416_paycoin_fixes,lendcoinfundation/lendcoin,lendcoinfundation/lendcoin,JoseBarrales/mlnc,LambocoinFoundation/Lambocoin,ligerzero459/paycoin,jwrb/paycoin,sengmangan/XPAY,thommyV91/Suck-a-Coin,coinkeeper/20150416_paycoin_fixes,JoseBarrales/mlnc,LambocoinFoundation/Lambocoin,Iamhumanareyou/EmprendeCoin,mitchellcash/paycoin,TheNameIsNigel/paycoin,LambocoinFoundation/Lambocoin,TheNameIsNigel/paycoin,coinkeeper/20150416_paycoin_fixes,lendcoinfundation/lendcoin,coinkeeper/20150416_paycoin_fixes,coinkeeper/2015-06-22_18-53_paycoin,thommyV91/Suck-a-Coin,LambocoinFoundation/Lambocoin,PaycoinFoundation/paycoin,TheNameIsNigel/paycoin,IngCr3at1on/paycoin,Iamhumanareyou/EmprendeCoin