Fix typo in Referee
Handle deletions in the Plug, the Referee and LocalStorage.

Now the Referee can receive different kind of commands (not just
updates), and also notify different commands.

In the Dealer, the work is now done by several types of Workers,
all sharing a common ancestor.
Remove empty dirs in LocalStorage during deletion of files.
Add tests for deletions
Merge branch 'deletions' into develop
Fix the authors in the documentation
LocalStorage: Remove dependency to sh in the tests
Don't use AF_UNIX socket for Escalator

AF_UNIX sockets are not supported on Windows.
On Unix, a hack was needed as Escalator couldn't
clean its socket properly.
Add signal managment for Windows
LocalStorage: Add basic Windows compatibility

Based on @entwanne's work.

This add event detections and a few tweaks for
Windows. Deletions and empty files are not supported.
Merge branch 'windows_support' into develop. Fix #59
Fix files visibility on Windows
LocalStorage: Ignore hidden files on Windows
Documentation draft for new configuration file & rule format.
First web API (list and get files metadatas)
bottle in requirements
Add requirements for docs
First draw of the specification of the API. Cf #21
Rename onitu.api into onitu.plug
Moving onitu/webapi to onitu/api