He updated it quite a few months ago and sent the file to me - now finally committed.

* The changes were necessary to fix issues with Ceres's Jet type in glm vector and matrix types
* Added glm-git-modified-readme.txt to explain these changes

* Added const and non-const overloads. The non-const is needed because of the RNG in PcaModel.
* Renamed a few variables for consistency

This is needed by the json-to-cereal-binary app to read the JSON generated from the Matlab BFM converter script.

Otherwise, it looked like JSONlab will not write the output file, probably because it's >1GB. See GitHub issue #29.

Renamed fit_shape_model to fit_shape, since it's fitting the shape in general (including blendshapes), and not only the PCA model.

Added a BUILD_UTILS CMake option, defaulting to OFF.

- Added expression fitting
- Added Surrey Face Model section
- Slightly restructured build and sample section
- Replaced ICIP with the VISAPP publication
- Replaced license badge with static one

Related to last commit: Added serialisation methods for boost::optional. Copied the file from https://github.com/USCiLab/cereal/pull/122, hopefully that pull-request will be accepted.
This commit adds the file to CMakeLists.

I don't think we need two representations for it, one struct with a type is easier. At the moment, we only use an orthographic camera anyway.

- As before, it should contain all the parameters necessary to render an image using OpenGL, and conform to the OpenGL conventions
- Updated all calling sites
- Added serialisation
- Added a convenience method to save the parameters to a json file

Probably needed because OpenCV needs it, and we depend on OpenCV.

The previous code is non-standard conformant, it was assigning a temporary to a non-const reference.
VS2015 accepts it most likely because of a non-standard extension.

* The inner mouth corners are not mapped since I think they don't realy exist in the 3D model.
* Some points are not defined on the reference and only present in the 3448 model and above.
* A few of the selected 3D vertices could be improved a bit, I have some notes on it, if someone is interested, contact me.

If not given, the mean will be used, which is the right thing in that case.