Merge pull request #351 from oliverschmidt/master

Removed unnecessary code from resolver.
Merge pull request #356 from oliverschmidt/master

Allow text screen memory to be aligned to 0x2000.
Add conf checks to CC2538dk conf file

Allows for specific apps to control more settings of the platform.
Merge pull request #355 from lab11/cc2538dk-conf-defines

Add conf checks to CC2538dk conf file
Updates CC2538 GPIO

1. Fixes two of the comments to GPIO macros. They were copied but not
updated.
2. Adds SET and CLR macros for controlling GPIO pins.
Merge pull request #353 from lab11/cc2538-gpio

Updates to CC2538 GPIO
- Optimized LAN91C96 driver for speed and size.

- Speed: The primary byte copy loops are reduzed to the bare minimum by adjusting the base pointer 'ptr' and loop register 'y' in such a way that the 'y' overflow matches the low byte of the loop size.

- Introduced a loop for setting the MAC address.

Additional minor fix:

- Properly start self modification with first location.