mtl 4.0.9470

Add boost dependency.
Update home page (more informative than former home page).

Closes #332
parmetis 4.0.3

Closes #218
mtl: Add head

Closes #312
OpenCV 2.4.6.1

Closes #337.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
GTSAM 2.3.0

GTSAM is the Georgia Tech Smoothing and Mapping library, which
is useful e.g. for robotics and vision processing.

Closes #338.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
ceres-solver 1.7.0

Remove the optional protobuf dependency.
Closes #339
mtl 4.0.9482

Closes #341