TODO - list of things to do for Lepton/Tauon:
   * AT91SAM9x :
      Merge all AT91 drivers (uart, spi, ..)
      PHY negociation problem on DM9000a
   
   * Kinetis :
      UART DMA RX/TX
      SPI DMA RX/TX, RX
      kill system call
      "USB device" driver
      I2C slave
   
   * Kernel :
      Finish errno framework
      Merge header files
      Make a library for kernel syscall
      Elf Loader
      MPU framework
      Improve partition system
      add pthread_cond
      add pthread_join
   
   * Networking :
      new lwip release
      UIP 1.0 (for IPv6)
   
   * Graphics :
      New version of microwindows/Nano-X
      Improve FLNX
      
   * Simulation :
      Multiple instance of virtual_cpu's
   
   * FS :
      FAT32
      FAT16 faster for Kinetis (maybe elm-chan.org)
      consistent fstype_lst (one place for definition)
      
   
   * Installation :
      Simplify eCos and Lepton/Tauon installation
