TODO : Check JTAG

Don't we need to have at least a common ground for the JTAG connection ? What about using this kind of supposedly standard header ? http://www.keil.com/support/man/docs/ulinkpro/ulinkpro_hw_if_jtag10.htm
Done : board rerouted, added test points, added screw holes, moved a few things around, almost ready to be produced once we are sure about the JTAG stuff & checked the components one last time.

Signed-off-by: Kamel Makhloufi <melka@blaste.net>