Adding octave trajectory smoother.

Lowdown: Fits a linear combination of radial basis functions to the
points constraining it to match the end points exactly and to have zero
velocity and acceleration there. Outputs a set of files
- <name>_T.txt
- <name>_Q.txt
- <name>_Qd.txt
- <name>_Qdd.txt
containing the time stamps, positions, velocities, and accelerations,
respectively.

Basic usage
- Place trajectory file in trajectories/<name>.txt
- Modify run_trajectory_smoother.m to reference name and specify the
  correct finger.
- Run that script.