Add accept-offers method (#16)

* Mirror the behaviour of the Java library.

This may be a risky change, as other code/projects could theoretically depend
upon the old behaviour (I'm pretty sure it was broken, regardless).

This addresses issue #8, but may need more work (depending upon impact).

* Updated method names to match current Proto.java.

* Fixed typo (:driver -> driver) in reregistered.

* Added import for operation and its constants.

* Added pb->data for Operation types.

* Added Operatoin record and pb->data method.

* Added pb->data for operation types.

* Finished first draft of #11.

* Added missing imports.

* Added accept-offers method.

src/mesomatic/scheduler.clj

@@ -16,6 +16,8 @@
 
 (defprotocol SchedulerDriver
   (abort!                  [this])
+  (accept-offers           [this offer-ids operations]
+                           [this offer-ids operations filters])
   (decline-offer           [this offer-id] [this offer-id filters])
   (join!                   [this])
   (kill-task!              [this task-id])
@@ -32,6 +34,16 @@
   (reify SchedulerDriver
     (abort! [this]
       (pb->data (.abort d)))
+    (accept-offers [this offer-ids operations]
+      (pb->data (.acceptOffers d
+                               (mapv (partial ->pb :OfferID) offer-ids)
+                               (mapv (partial ->pb :Operation) operations)
+                               (->pb :Filters {:refuse-seconds 1}))))
+    (accept-offers [this offer-ids operations filters]
+      (pb->data (.acceptOffers d
+                               (mapv (partial ->pb :OfferID) offer-ids)
+                               (mapv (partial ->pb :Operation) operations)
+                               (mapv (partial ->pb :Filters) filters))))
     (decline-offer [this offer-id]
       (pb->data (.declineOffer d (->pb :OfferID offer-id))))
     (decline-offer [this offer-id filters]