Update CHANGELOG for 4.1.1
Update CHANGELOG for 4.1.1

braintree/braintree_ios,braintree/braintree_ios,billCTG/braintree_ios,billCTG/braintree_ios,apascual/braintree_ios,billCTG/braintree_ios,billCTG/braintree_ios,apascual/braintree_ios,braintree/braintree_ios,apascual/braintree_ios,Feverup/braintree_ios,apascual/braintree_ios,Feverup/braintree_ios,Feverup/braintree_ios,Feverup/braintree_ios,billCTG/braintree_ios,braintree/braintree_ios