Merge pull request #697 from civicrm/MikeyMJCO-patch-1

Add "in progress" note to Financial section pages.

docs/financial/OrderAPI.md

+!!! abstract
+    This area of CiviCRM code and documentation is a work-in-progress. Not all features
+    will be documented and the core code underlying this area may change from version
+    to version.
+
 The Order API is intended to be used as the primary API for adding, updating, and deleting orders.
 
 An 'order' is a non-CiviCRM term that corresponds to how CiviCRM uses its contribution object in terms of handling the full life-cycle of a purchase of memberships, event registrations or making a donation. Unlike most APIs, there is no table directly associated with the Order API.

docs/financial/PaymentAPI.md

-Payment API
+!!! abstract
+    This area of CiviCRM code and documentation is a work-in-progress. Not all features
+    will be documented and the core code underlying this area may change from version
+    to version.
+
+## Payment API
 
 Historically, one recorded a payment against a contribution by changing its payment status, for example from Pending to Completed. 
 

docs/financial/overview.md

+!!! abstract
+    This area of CiviCRM code and documentation is a work-in-progress. Not all features
+    will be documented and the core code underlying this area may change from version
+    to version.
+
 The financial subsystem in civicrm encompasses:
 
 - contributions