[drape] context stub. It will be contans Draw* methods. Will be specified by Komяpa

drape_frontend/engine_context.cpp

@@ -0,0 +1,8 @@
+#include "engine_context.hpp"
+
+namespace df
+{
+  EngineContext::EngineContext()
+  {
+  }
+}

drape_frontend/engine_context.hpp

@@ -0,0 +1,11 @@
+#pragma once
+
+namespace df
+{
+  class EngineContext
+  {
+  public:
+    EngineContext();
+    /// TODO котяра обещал описать данный интерфейс
+  };
+}