Create dhcpd dir under var if non-existing
changed Requires to PreReq for somes packages
Include missing module and remove call to older api
Fixed refactor error
Full path in permission error messages
Fixed Billing form validation
Update PacketFence_Administration_Guide.asciidoc
Should check for dir rather than exist
Added MySQL schema link for devel purposes
modified pre priorities
Rename pf::DB to pf::RoseDB
Update PacketFence_Administration_Guide.asciidoc

Extra information on the billing set up.
Added additional validation
Specify the package name perl-aliased
Added a default message
Update PacketFence_Administration_Guide.asciidoc

infos on billing configuration.
improved samba configuration
fix permission changed before starting service
Status should return "0" when there are no submanagers
Comment mod_unique_id in portal http configuration