Custom boot loader example.

This example boot loader makes use of GPIO pin PORTA2 to allow manipulation
of the ACE TCP/IP configuration for the application image. 

Upon boot up, when PORTA2 (DSR) is held low the boot loader examines the current
stored ACE configuration. If the current configuation is DHCP it is disabled and 
a static configuration is setup and enabled. If the configuration is found to be
static, DHCP is enabled and static is setup with a 60 second delay, in the case 
where a DHCP server is not accessible.

Using this example code:

1. Copy the blmain.c file into your platform directory, e.g. for the Connect ME,
   copy this file to src/bsp/platform/connectme.
2. Rebuild the BSP.


Supported platforms:

Although any of the ARM7 platforms should work this modification was only tested
on the Connect ME platform.
