Merge branch 'script_pxe' into 'master'

addons/kadeploy.bash

bin/kaconsole3

bin/kadeploy3

bin/kaenv3

bin/kanodes3

bin/kapower3

bin/kareboot3

bin/kastat3

db/db_creation.sql

db/update-3.7-add-arch-in-env.sql

db/update-3.7-add-custom-var-and-created-at-in-env.sql

db/update-3.7-g5k-rename-envs.sql

lib/kadeploy3/client/client.rb

lib/kadeploy3/common/api.rb

lib/kadeploy3/common/compat.rb

lib/kadeploy3/common/configparser.rb

lib/kadeploy3/common/environment.rb

lib/kadeploy3/common/error.rb

lib/kadeploy3/common/execute.rb

lib/kadeploy3/common/fetchfile.rb