recurly 7.x-1.0-alpha2

A fairly minor update overall from Alpha1, but the Alpha2 version fixes a few major bugs that would cause trouble for any new sites using the module. This upgrade is recommended for all users of the Recurly module.

Bug fixes:

• #1649348: Implement hook_requirements and check for required recurly code libraries.
• #1649348 by eojthebrave: Implement hook_requirements and check for required recurly code libraries.
• Fixing typo in variable name which prevent signup.
• #1649536 by eojthebrave: Typo. Subsription should be Subscription.
• #1649592 by eojthebrave: Formatting of table on configuration page incorrect when table is empty.
• #1648148: Termination options shown to users without "administer recurly" permission.

New features:

• #1648164: Split "Change plan behavior" into separate options for "Upgrade" and "Downgrade".
• #1648150: Provide a "single-subscription" mode.
• Prepopulate Recurly.js fields based on tokens.