fixed links and reworded a couple of things in the readme
Added pull up/down functions to use the internal resistors

Uses resistors internal to the MCU.
Added rising and lowering pin interrupts.

Two additional functions with little overhead. Added functionality for no
cost.
Fixed issue with Time handling unused tasks

UnusedEnd was set to point to the first pointer instead of the end,
meaning that as soon as a task is returned to the unused pile, all of the
following tasks are lost.
Standardized pwm response to invalid data.

Made it so all of the pwm based functions (motor/servo/pwm) respond to
invalid data safetly and consistently by not changing their current state.
Demo Cleaned Up

Pending testing
Changed demo pins to match booster pack
Merge branch 'master' of https://github.com/ut-ras/Rasware2013
Added Sonar code and crushed tabs
changed more pins and formatting
Merge branch 'master' of https://github.com/ut-ras/Rasware2013
Fixed inconsistent brackets and tabs, 4 space standard. Added Switch cases for different look, let me know if you prefer if/else statements for readability