Added support for the license key constant GRAVITY_FLOW_FORM_CONNECTOR_LICENSE_KEY.
Updated Gravity_Flow_Step_Update_Entry::get_entry_lookup_search_criteria() to support processing merge tags. Credit: Jake Jackson.
Deprecated Gravity_Flow_Step_Update_Entry::gravityflow_entry_lookup_sort_criteria()
Deprecated Gravity_Flow_Step_Update_Entry::gravityflow_entry_lookup_search_criteria()