ADG canvas 0.9.4 released * Allow to build the ADG project with meson (https://mesonbuild.com). This is a major feature that allows to modernize part of the codebase and speed up the building process. The legacy autotools code will be kept around for some time, but meson is the preferred one. * Drop Travis code integration and switch to GitLab. Thanks for the fish Travis, but the new model is not that opensource friendly. * New API (adg_canvas_export_data) that returns the data as a memory chunk instead of writing it to a file. This is a requirement for adg-openresty (https://github.com/ntd/adg-openresty). * Update documentation building to latest gtk-doc changes. * Improve uninstalled detection at runtime: the adg-demo-uninstalled hack is no longer needed. * Fix g_memdup vulnerability.