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/widgets/uiminiwindow.lua

@@ -0,0 +1,122 @@
+UIMiniWindow = extends(UIWindow)
+
+function UIMiniWindow.create()
+  local miniwindow = UIMiniWindow.internalCreate()
+  return miniwindow
+end
+
+function UIMiniWindow:onSetup()
+  self:getChildById('closeButton').onClick = function() signalcall(self.onClose, self) end
+  self:getChildById('minimizeButton').onClick = function() signalcall(self.onMinimize, self) end
+end
+
+function UIMiniWindow:onDragEnter(mousePos)
+  local parent = self:getParent()
+  if not parent then return false end
+
+  if parent:getClassName() == 'UIMiniWindowContainer' then
+    local containerParent = parent:getParent()
+    parent:removeChild(self)
+    containerParent:addChild(self)
+  end
+
+  local oldPos = self:getPosition()
+  self.movingReference = { x = mousePos.x - oldPos.x, y = mousePos.y - oldPos.y }
+  self:setPosition(oldPos)
+  self.free = true
+  return true
+end
+
+function UIMiniWindow:onDragMove(mousePos, mouseMoved)
+  local oldMousePosY = mousePos.y - mouseMoved.y
+  local children = rootWidget:recursiveGetChildrenByMarginPos(mousePos)
+  local overAnyWidget = false
+  for i=1,#children do
+    local child = children[i]
+    if child:getParent():getClassName() == 'UIMiniWindowContainer' then
+      overAnyWidget = true
+
+      local childCenterY = child:getY() + child:getHeight() / 2
+      if child == self.movedWidget and mousePos.y < childCenterY and oldMousePosY < childCenterY then
+        break
+      end
+
+      if self.movedWidget then
+        self.setMovedChildMargin(0)
+        self.setMovedChildMargin = nil
+      end
+
+      if mousePos.y < childCenterY then
+        self.setMovedChildMargin = function(v) child:setMarginTop(v) end
+        self.movedIndex = 0
+      else
+        self.setMovedChildMargin = function(v) child:setMarginBottom(v) end
+        self.movedIndex = 1
+      end
+
+      self.movedWidget = child
+      self.setMovedChildMargin(self:getHeight())
+      break
+    end
+  end
+
+  if not overAnyWidget and self.movedWidget then
+    self.setMovedChildMargin(0)
+    self.movedWidget = nil
+  end
+
+  return UIWindow.onDragMove(self, mousePos, mouseMoved)
+end
+
+function UIMiniWindow:onMousePress()
+  local parent = self:getParent()
+  if not parent then return false end
+  if parent:getClassName() ~= 'UIMiniWindowContainer' then
+    self:raise()
+    return true
+  end
+end
+
+function UIMiniWindow:onDragLeave(droppedWidget, mousePos)
+  if self.movedWidget then
+    self.setMovedChildMargin(0)
+    self.movedWidget = nil
+    self.setMovedChildMargin = nil
+    self.movedIndex = nil
+  end
+end
+
+function UIMiniWindow:onFocusChange(focused)
+  -- miniwindows only raises when its outside MiniWindowContainers
+  if not focused then return end
+  local parent = self:getParent()
+  if parent and parent:getClassName() ~= 'UIMiniWindowContainer' then
+    self:raise()
+  end
+end
+
+function UIMiniWindow:onClose()
+end
+
+function UIMiniWindow:onMinimize()
+  if self:isOn() then
+    self:setOn(false)
+    self:getChildById('contentsPanel'):show()
+    self:getChildById('miniwindowScrollBar'):show()
+    self:getChildById('bottomResizeBorder'):show()
+    self:getChildById('minimizeButton'):setOn(false)
+    self:setHeight(self.savedHeight)
+  else
+    self.savedHeight = self:getHeight()
+    self:setHeight(self.minimizedHeight)
+    self:setOn(true)
+    self:getChildById('contentsPanel'):hide()
+    self:getChildById('miniwindowScrollBar'):hide()
+    self:getChildById('bottomResizeBorder'):hide()
+    self:getChildById('minimizeButton'):setOn(true)
+  end
+end
+
+function UIMiniWindow:getClassName()
+  return 'UIMiniWindow'
+end