Various fixes/changes from intial testing of the HCI UART on the...

Various fixes/changes from intial testing of the HCI UART on the STM32F4-Discovery board.  Re-organized how the Blutetooth network driver is initialized.  Added lots of new debug output.  Add a new STM32 F4 Discovery configuration for testing the HCI UART.  Various fixes to get through initialization (still does not).