Merge pull request #1 from swierq/master

Just a test request
added wwpns view
fixed bug in scoped lparstat view
fixed bug in aix_alerts
Merge branch 'master' of https://github.com/adejoux/aix_inventory
work on documentation
added disk driver in wwpn view
extracted hardware from server model
reworked xlsx export
switched to postgresql to use hstore
added sidekiq
added clockwork
added clockwork
added swierq health_checks
integrated heatch_checks
added foreman
work on inventory import
reverted to mysql
minor cleanup
added linux security fixes