fixed bugs 159 and 160:

+ added threaded timers support
! fixed restoring sdl window focus (AV in windows message handler)
! disabled forgotten cdrom and joystick in config file.
* disabled minimizing sdl window while loosing focus.
  PocketPC does not have a task bar, so it is an inconvenient and unusual
  behaviour for PPC users.
+ added WIN_Paint handler for GAPI
! fixed loosing focus while using GAPI videi driver

+ added TestTimer project
* removed unnecessary macros (ENABLE_WINDIB ...) from projects

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%401501