Merge branch 'pre-2019.01.00' into 'master'

bienvenue.md

doc_module_gtf

doc_module_vitis

index_installation.rst

installation/linux/index.rst

installation/linux/installation_linux.md

installation/procedure_installation_gtf.md

installation/procedure_maj_gtf.md

installation/windows/composants.md

installation/windows/index.rst

installation/windows/initialisation_admin.md

installation/windows/installation_moteur.md

installation/windows/mis_a_jour_gtf.md