Version 2.4.6

• Added setup_fee_accounting_code to Plan #179
• Added applies_to_non_plan_charges to Coupon #181
• Added redemption_resource to Coupon #181
• Added X-Api-Version request header at 2.1 #181
• Added uuid to Account #181
• Added redemptions to Account #181
• Added max_redemptions_per_account to Coupon #181
• Added redemptions to Subscription #181
• Added coupon_codes to Subscription #181
• Added CACertPath to Recurly_Client #176