getProperty() and setProperty() (#80)

* Fuck

* Add getProperty() and setProperty()

* Add getters and setters to VisualObject

* Update Frame and BaseFrame

* Update Flexbox

* Update Button and Label

* Update Input

* Update Image

* Update Checkbox

* Update Program

* Update Progressbar

* Update Slider

* Update Scrollbar

* Update Switch

* Update Textfield

* Update Timer

* Update List

* Update Dropdown

* Update Radio

* Update Menubar

* Update Graph

* Update Treeview

Basalt/objects/Slider.lua

@@ -46,6 +46,10 @@ return function(name, basalt)
             return self
         end,
 
+        getSymbol = function(self)
+            return symbol
+        end,
+
         setIndex = function(self, _index)
             index = _index
             if (index < 1) then
@@ -67,18 +71,30 @@ return function(name, basalt)
             return self
         end,
 
+        getMaxValue = function(self)
+            return maxValue
+        end,
+
         setSymbolColor = function(self, col)
             symbolColor = col
             self:updateDraw()
             return self
         end,
 
+        getSymbolColor = function(self)
+            return symbolColor
+        end,
+
         setBarType = function(self, _typ)
             barType = _typ:lower()
             self:updateDraw()
             return self
         end,
 
+        getBarType = function(self)
+            return barType
+        end,
+
         mouseHandler = function(self, button, x, y)
             if (base.mouseHandler(self, button, x, y)) then
                 mouseEvent(self, button, x, y)