Add configuration file for modulesync

https://github.com/puppetlabs/modulesync
Sync files
Merge pull request #173 from cmurphy/master

Start synchronizing module files
Add puppet 3.3 -> 3.6 to travis matrix
Enable strict_variable when puppet version >= 3.5
Add missing facts in unit tests
Initialize $ntp::params::logfile to undef for strict_variable compliance