(svn r15027) -Merge: tomatos and bananas left to be, here is NoAI for all to see.

NoAI is an API (a framework) to build your own AIs in. See:
   http://wiki.openttd.org/wiki/index.php/AI:Main_Page
 With many thanks to:
  - glx and Rubidium for their syncing, feedback and hard work
  - Yexo for his feedback, patches, and AIs which tested the system very deep
  - Morloth for his feedback and patches
  - TJIP for hosting a challenge which kept NoAI on track
  - All AI authors for testing our AI API, and all other people who helped in one way or another
-Remove: all old AIs and their cheats/hacks

src/ai/api/ai_enginelist.cpp

@@ -0,0 +1,16 @@
+/* $Id$ */
+
+/** @file ai_enginelist.cpp Implementation of AIEngineList and friends. */
+
+#include "ai_enginelist.hpp"
+#include "../../company_func.h"
+#include "../../engine_base.h"
+#include "../../core/bitmath_func.hpp"
+
+AIEngineList::AIEngineList(AIVehicle::VehicleType vehicle_type)
+{
+	Engine *e;
+	FOR_ALL_ENGINES_OF_TYPE(e, (::VehicleType)vehicle_type) {
+		if (HasBit(e->company_avail, _current_company)) this->AddItem(e->index);
+	}
+}