Refactoring and flexibility changes

* Split game module into game and game_interface
* Move core_lib to corelib
* Move miniwindow to corelib
* Introduce init.lua script for initializing the client, giving much more flexibility
* OTClient is no longer Application derived and is much simpler

modules/corelib/ui/effects.lua

@@ -0,0 +1,36 @@
+Effects = {}
+
+function Effects.fadeIn(widget, time, elapsed)
+  if not elapsed then elapsed = 0 end
+  if not time then time = 300 end
+  widget:setOpacity(math.min(elapsed/time, 1))
+  removeEvent(widget.fadeEvent)
+  if elapsed < time then
+    removeEvent(widget.fadeEvent)
+    widget.fadeEvent = scheduleEvent(function()
+      Effects.fadeIn(widget, time, elapsed + 30)
+    end, 30)
+  else
+    widget.fadeEvent = nil
+  end
+end
+
+function Effects.fadeOut(widget, time, elapsed)
+  if not elapsed then elapsed = 0 end
+  if not time then time = 300 end
+  elapsed = math.max((1 - widget:getOpacity()) * time, elapsed)
+  removeEvent(widget.fadeEvent)
+  widget:setOpacity(math.max((time - elapsed)/time, 0))
+  if elapsed < time then
+    widget.fadeEvent = scheduleEvent(function()
+      Effects.fadeOut(widget, time, elapsed + 30)
+    end, 30)
+  else
+    widget.fadeEvent = nil
+  end
+end
+
+function Effects.cancelFade(widget)
+  removeEvent(widget.fadeEvent)
+  widget.fadeEvent = nil
+end