Can now detect if it's a CentOS or Arch Linux
New detection of linux distrib
Added support of CentOS (and RedHat)
Cleanup and better detection
Centos integration seems to be fully working
Check disk from a tuple
Added a check for the webserver port availability

A function in the new "web" module checks if a port is used (on the local or a remote computer). In this case, the webserver is not loaded and an error is written in logs.
Removed useless config.py script

This script is not used anymore with versions 0.2.0+, and can't work with new security features.
This will improved in the feature with a manager in CLI (but not now :P)
Updated NEWS (removed config.py script)
Updated NEWS with the "port check" improvement
Cleaned bash functions with a "return" statement
Removed an old TODO in the bash functions (related to config.py script)
Added docstring and refactored return values for all bash functions

All functions have now docstring (except launch_config_assistant, deleted in #73).
The return values have been refactored: each error returns is own error code instead of the sub-command error code.
Refactored variable contents in the bash function "create_cr_user" (#69)
Spelling fixes
Updated bash docstrings

(spelling fixes)
Updated NEWS for #74 (Bash function cleaned)
Merge pull request #73 from CentralReport/fix-config-script

Removed useless config.py script
Merge remote-tracking branch 'origin/develop' into feature-port-check

Conflicts:
	NEWS
Merge pull request #72 from CentralReport/feature-port-check

Added a check for the webserver port availability

For the issue #65.