Finalize board layouts for pilot

Relaid out the following boards:
- combined_controller
- gsm_module
- card_adapter

* Switched to PIC25FJ64GA306 microprocessor from PIC24F16KA101 because it supports battery backup of the RTCC and has 64K rom and 8K ram.  
* Boards are now a standard 1.3" by 2" for each module.