* improve documentation on all defines
* rename modules_dir to module_dir and modules_file to module_file
* create $module_dir_path to achieve DRY-ness
* silence the lsb_release stuff
* improve concatenated_file to use an intermediate file, improving reliability
and decoupling the updateing from notifying our peers.
* remove serveral functions that were moved to puppet proper:
- sha1 => sha1
- gsub,substitute,slash_escape => regsubst
