i18n: RADIUS authentication, add german, fix english

Add german translation for the RADIUS module and fix some
minor nits in the english reference.

Adds license header in both translation like elsewhere in the project.
i18n: Add first wizard screen in german
i18n: Add german translation of config screen

While the english translation was used as reference, sometimes
the french file was used as complementary reference too.
boot.conf: Fix erroneous labels of user display name

Display name tells us what it actually is and
the french translation already makes use of this
terminology.
boot.conf: Improve display name use more consistent

- In french Nom d'affichage is already used for the admin
  login, make it the same for regular users.
- Small precision in german translation
- Adjust the english description, the display name
  is the name shown to users, unrelated to user-friendlyness
- Finally: Adapter the label for the description modifed so
  it matches the actual english definition everywhere.
boot.conf: Introduce tooltip for Mail address

- Originally missing the tooltip was actually from the display name
- Tries to reflect gender-neutral usage for german and french, in english
  not required
- Reuses Email in french as used in pydio, although there are various
  more or less official definitions in french.
boot.conf: Connexion -> Connection

Possibly a "french-ism", although connexion exists in british
(Oxford) english, american english doesn't use this term. I've
never seen a english program using the british variant, sorry Brits. ;-)
boot.conf: Terminology for configuration store

Although many sets of configuration(s) make up the whole
Pydio configuration, I guess we can speak about having one
(large) set of configuration data to rule them all, thus similar
to other applications we have a singular configuration storage.
boot.conf: Proposed improvement on user guidance

In first instance admins should be made aware of what makes
the difference in using a DBMS as config storage or a serialized
file.

At this stage they are not/less interested in knowing what type of DBMS,
only when they want to go with a DBMS, let them chose from the list of
DBMS supported by Pydio.
Check-in a brand new theme
New theme
FilesList: apply fitHeightToBottom only if option is set.
Breadcrumb: pass options for different breadcrumb
ActionToolbars: set the "more" button inside "get" group, not "put"
Hide tree images in orbit theme
Orbit theme tries
Fix compilation problems
Upload action now ask for the uploader type. Downloader.http moved as an uploader. Add some color in orbit theme.
Orbit - Follow up
Orbit Compilation
Droppable