Refactor modules, closes #223

* All modules are sandboxed now
* All images,sounds,fonts,translations and styles were moved to "data" folder
* Reorganize image files folders
* Remove unmaintained modules: client_particles, client_shaders
* Implement new automatic way to load styles and fonts
* Add hide/show offline option in VipList
* Add invite/exclude to/from private channel in players menus
* Many other minor changes

modules/game_bugreport/bugreport.lua

@@ -5,7 +5,7 @@ bugReportWindow = nil
 bugTextEdit = nil
 
 function init()
-  g_ui.importStyle('bugreport.otui')
+  g_ui.importStyle('bugreport')
 
   bugReportWindow = g_ui.createWidget('BugReportWindow', rootWidget)
   bugReportWindow:hide()

modules/game_bugreport/bugreport.otmod

@@ -3,7 +3,7 @@ Module
   description: Bug report interface (Ctrl+Z)
   author: edubart
   website: www.otclient.info
-  scripts: [ bugreport.lua ]
+  scripts: [ bugreport ]
   sandboxed: true
   @onLoad: init()
   @onUnload: terminate()