Move to tampakrap.gr nodes

Split nodes declarations to separate node.pp file
Add global configuration in site.pp
Rename modules-services to modules-profiles
remove puppet-r10k (will use a new one), ssl and nginx (will re-add them later)
rename infrastructure to service module
move service::puppetmaster to service::puppet::master
More service::puppetmaster -> service::puppet::master renames
introduce service::puppet::agent