Driver Rewrite

[dimembermatt]

Getting to a point where driver API can be standardized in a nice way. This will break existing ABI and will be rc v0.3.0. This will likely be the final RC.
I am leaning towards the following design:

Example ADC Driver

adc_config_t // All drivers have a configuration struct
adc_t            // All drivers have a driver struct

// All driver inits return an error code defined in inc/error.h. An error header will be provided. This could be chained with a pre-initialized watchdog timer for performing actions on failed initialization.
Error_t adc_init(adc_config_t config, adc_t* adc);
...

We'll also swap the linux kernel coding conventions, since TM4CDrivers will eventually be extended into TM4CRTOS...