remove get_dirs and cache in get_attr
manage creation/last modification date for files and folders
clean path normalization in create dir
comment and clean file_descriptor
Merge pull request #5 from poupotte/feature/cache

remove get_dirs and cache in get_attr
Merge pull request #6 from poupotte/master

Improve statfs to display cozy space disk
Merge branch 'feature/cache' of https://github.com/poupotte/cozy-fuse-linux

Conflicts:
	cozyfuse/couchmount.py
Merge branch 'master' of github.com:mycozycloud/cozy-fuse-linux
fix make dir