[fix] Properly remove device remotely
remove duplicated tests folder
make file temporary system read-only
download file in a cache folder before accessing it
[enh] Improve performance on binary replication
Merge branch 'master' of github.com:Kloadut/cozy-fuse-linux

Conflicts:
	cozyfuse/actions.py
add module to handle file caching
handle local file caching when a file is requested.

+ two commands to force caching before accessing
use local database instead of remote one for caching
make binary cache proper and simpler
add uncache commands
Merge pull request #19 from frankrousseau/master

Fix binary Replication + Handle file caching + Read only mode