Multiple changes to DisplayServerX11

- Travis: Change x11 to linuxbsd
- SCons: Change x11 plataform to linuxbsd
- Plugins: Remove ; to avoid fallthrough warning
- DisplayServerX11: Implement set_icon
- DisplayServerX11: Fix X11 bug when a window was erased from windows
  map, all the changes from that erased windows are sending to the main
  window
- DisplayServerX11: Reorder create_window commands
- DisplayServerX11: Change every Size2 to Size2i and Rect2 to Rect2i
  where it belongs

+ More X11 fixes which have been integrated directly back into reduz's
original commits while rebasing the branch.

platform/server/detect.py

@@ -16,7 +16,7 @@ def get_name():
 def get_program_suffix():
     if (sys.platform == "darwin"):
         return "osx"
-    return "x11"
+    return "linuxbsd"
 
 
 def can_build():