pybind11 deprecated .check().

This is to be consistent on the order of the elements with C++ and Matlab.

Specifically, added python bindings for:
* LandmarkMapper (core submodule)
* EdgeTopology, load_edge_topology()
* ContourLandmarks, ModelContour
* fit_shape_and_pose()
* Mesh (render submodule)

Enabling GENERATE_PYTHON_BINDINGS on travis

Previously, we would just copy the whole folders, which resulted in a quite large install folder. Now we're only copying the headers and the licence files.

Added Matlab bindings for the fitting function

For system where Matlab is not found automatically.

This mainly required conversions for glm quat and mat4x4.

This contains conversion for vector<glm::tvecX> for the vertices, colours, and texcoords, and vector<array<int, 3>> for the triangle indices.
We can now successfully return a Mesh to Matlab.

Calling it works great!
No result is returned yet from C++ to Matlab.

This works when the current working directory in matlab is eos/matlab!