Cannot build figures with Vagrant

[sCreami]

Scripts have been made to build figures using InkScape on OS X 10.6, but now these scripts are deprecated in an unix environment using Vagrant.
I personnaly tried to update these scripts with ImageMagick but it seems to not appreciate the metadata of some svg files and thus cannot properly generate png.

A port of these scripts using the unix version of InkScape should be made to fix the missing figures of Sphinx builds.

[sCreami]

#187 fix this issue, but still needs to update the Vagrantfile with sudo apt-get install -y inkscape

It actually fix only partially the problem. More scripts need to be changed and sips needs to be replaced with something else.