Add init command
Update vm
Set cache file sd
Set cpus defzult value to 2
Merge pull request #1134 from nlegoff/up-vm

[READY][3.8.6] Update VM
Merge pull request #1121 from nlegoff/ini-command

[READY][3.8.6] Add developer command to reset environment
Merge branch '3.8'

Conflicts:
	.travis.yml
	bin/developer
	build-env.sh
	lib/Alchemy/Phrasea/Application.php
	lib/Alchemy/Phrasea/Core/Provider/LocaleServiceProvider.php
	tests/Alchemy/Tests/Phrasea/Command/Setup/XSendFileMappingGeneratorTest.php
	tests/Alchemy/Tests/Phrasea/Controller/SetupTest.php
	tests/Alchemy/Tests/Phrasea/Form/Login/PhraseaRegisterFormTest.php