Release 0.5.0

**It's time to refresh the master! :)**

Included in this release:
(Yeah, some works has been started one year ago...)

- **Improvement [#77](https://github.com/CentralReport/CentralReport/pull/77)**: Added support for unit testing and behaviors tests

- **Improvement [#92](https://github.com/CentralReport/CentralReport/pull/92)**: Updated disk collector for Linux
    * Disks are now gotten by their UUID, and their Linux names are displayed.

- **Improvement [#52](https://github.com/CentralReport/CentralReport/pull/52)**: Many improvements
    * This pull request was initially dedicated to CentralReport Online. As this project will take a new start,
      all references to CRO was removed, and only important improvements was kept.

- **Improvement [#95](https://github.com/CentralReport/CentralReport/pull/95)**: NEWS file is now in markdown

- **Fix [#93](https://github.com/CentralReport/CentralReport/pull/93)**: Fixed uptime displayed on the web server
    * Seconds are now refreshed in uptime data

- **Fix [#94](https://github.com/CentralReport/CentralReport/pull/94)**: Added timezone management in the Javascript part

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## Remains to be done:
- [x] Update the version number in the Config module
- [ ] Write the release notes into the official documentation
- [ ] Update the release date in the NEWS file