Add branch-alias to composer

Add branch alias to help bundle versionning and user upgrades
Update installation to fit to branch alias
Merge pull request #3 from nicolas-bastien/patch-1

Add branch-alias to composer
Merge pull request #4 from nicolas-bastien/patch-2

Update installation to fit to branch alias
Merge branch 'master' into firewall_config
[firewall_config] updated README, added unit tests