Layouts (#189)

* Layout WIP

* Widgets/BoxLayout: Fix layout algorithm

* Widgets/BoxLayout: Fix box layout algorithm for good

* SDK/Widgets: Remove padding

* Sdk/Widgets: Make use of minimum/preferred size

* Sdk/TextAreaWidget: Add Minimum/PreferredSize to TextArea

* Sdk/Widgets: Add height/width variants of get/set fixed, maximum, minimum and preferred size methods

* Sdk/BoxLayout: Remove useless code

* Sdk/TextAreaWidget: Fix compilation

* Widgets/TextAreaWidget: Fix cursor position

build/scripts/tools/ndk_server.lua

@@ -36,6 +36,7 @@ TOOL.FilesExcluded = {
 	"../SDK/**/Particle*Component.*",
 	"../SDK/**/ParticleSystem.*",
 	"../SDK/**/RenderSystem.*",
+	"../SDK/**/*Layout*.*",
 	"../SDK/**/*Widget*.*",
 	"../SDK/**/LuaBinding_Audio.*",
 	"../SDK/**/LuaBinding_Graphics.*",