recurly 7.x-1.2

This update fixes a number of small bugs, updates documentation, adds Views support, and adds a "cancel" button to the "change plan" and "cancel plan" forms.

Changes since Recurly 7.x-1.1:
#2325869: Undefined index #coupon_code in recurlyjs_element_expand() by deviantintegral: Undefined index #coupon_code in recurlyjs_element_expand()
#2386653: Fatal error: Unsupported operand types in recurly.admin.inc on line 407 by Jaesin: Fatal error: Unsupported operand types in recurly.admin.inc on line 407
#2474863: Add cancel option to change plan and cancel subscription confirmation forms by eojthebrave: Add cancel option to change plan and cancel subscription confirmation forms
#2307137: Add Views support for Recurly accounts by deviantintegral: Add Views support for Recurly accounts
#2299209: Make API form labels consistent with Recurly key names by aburke626, updating form field description to reflect Recurly sandbox changes.
#2299209: Make API form labels consistent with Recurly key names by aburke626, updating README to reflect Recurly key name changes.
#2417633: Typo in recurly.pages.inc by aburke626: Typo in recurly.pages.inc.