Removed example42-concat
Added puppetlabs concat submodule
ATTENTION: Removal of all 1.0 modules

Major changes happening here.
All 1.x modules are removed from this repo (check 1.x branch to retrieve them)
Ground is being prepared for 3.x modules.

2.x and 3.x modules are both going to be linked here as submodules.

Conversion from 2.x to 3.x is going to be done in the following months.
Use https://github.com/example42/puppet-modules-nextgen for only NextGen (2.x) modules
and https://github.com/example42/puppet-modules-stdmod for only StdMod (3.x) modules.