Added walking functionality in C++

Not sure why it jumps into walking position when the module is added.
initWalking() moves DARwIn into walk ready position smoothly
Added Python wrapper for walking functions
Removed un-needed search paths
Walking now accepts a duration and direction (for turning L & R)
New walk method for specifying direction and duration works in Python
Attempts to initialize 5 times before failure
Verify that the robot is initialized correctly before walking or moving