Add an ensure parameter to concat define

This parameter controls whether ressources associated to concat should be present or absent.
Ensure that ::setup runs before ::fragment in all cases.
Merge pull request #71 from apenney/fragments

Fragments
Merge pull request #39 from FredericLespez/master

Add an $ensure parameter to concat
Help message for pluginsync now references the correct section of the config
Merge pull request #73 from blewa/pluginsync_fix

Help message for pluginsync now references the correct section of the config
Updated .gitignore for spec generated files
Merge pull request #74 from petems/spec_refactor

Updated .gitignore for spec generated files