Give - Recurring Donations 2.7.0

* New: There is now a hidden field that can be used by other plugin authers to determine whether the given donation was recurring or not.
* Fix: Currency formatting was incorrect (too many decimal values would show) for the recurring helper text when choosing a recurring level.

* New: Now you can provide your donors with the option to select their recurring subscription giving frequency. This provides more flexibility to their giving choices and should help increase recurring subscription conversions.
* Fix: Renewals would show incorrectly when filtering on the donations listing page.
* Fix: Multi-level recurring forms with dropdown were not updating the recurring amount description correctly.
* Fix: Conflict with manual donations and 1.4.x of recurring.

* Fix: Resolved issue with PHP 5.2 - 5.4 causing PHP error when the plugin attempts to load.