clean main style files

But it's still requires many improvements
set new sharing mode

Now there is only the shared and private folder. A private folder is a folder
with no access.
A shared folder can be shared with a simple url or with a list of guest urls.
change file icons when sharing status is changed
add missing comments
fix inheritance
build
fix en locale about sharing
build
misc. lang fix
Update en.coffee

typofix
Merge pull request #215 from goofy-bz/patch-5

Update en.coffee
Merge pull request #214 from goofy-bz/patch-4

misc. lang fix
improve cake file for client tests

* log output continuously
* allow to run only a single test file
fix tests + remove weird tests

Some tests raised error on casper basic operation. Because I was in a rush and
I didn't understand why they failed, I commented them.
Merge branch 'master' of github.com:cozy/cozy-files
client tests: exit with code 1 if a test failed
fix clearance behavior

- modal share opens in public mode by default
- shared by inheritance doesn't change the icon
fix icon glitches after spinholder displaying
fix force public when share modal is displayed
fix file name for inline download