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_interface/interface.otmod

@@ -4,7 +4,7 @@ Module
   author: OTClient team
   website: www.otclient.info
   sandboxed: true
-  scripts: [ widgets/uigamemap.lua, widgets/uiitem.lua, gameinterface.lua ]
+  scripts: [ widgets/uigamemap, widgets/uiitem, gameinterface ]
   load-later:
     - game_hotkeys
     - game_questlog
@@ -24,7 +24,6 @@ Module
     - game_playertrade
     - game_ruleviolation
     - game_bugreport
-    - game_shaders
     - game_playerdeath
     - game_playermount
     - game_market