Document fully how to set up Maven module to have auto-installed ACLs

[pun-ky]

1. create Maven module with corresponding file including following vault hook
2. create a vault filter at path /conf/apm/scripts/myproject
3. create a script file example.apm and corresponding example.apm.dir/.content.xml in which property apm:launchHook need to be specified

please make the above more official to make potential APM users more easy introduction