Update crud.ctrl.php to hide translate button

if there is only one context defined.
Merge pull request #26 from Foine/patch-2

Update crud.ctrl.php to hide translate button
Bugfix : controller front, POST and _preview use cache
- Adding a config novius-os.cache for use of cache on front, by default true except in development
- Setting configs novius-os.cache_duration_page and novius-os.cache_duration_function at 60 by default
- Bugfix : controller front, POST and _preview use cache
Merge pull request #28 from novius-os/feature/cache

- Adding a config novius-os.cache for use of cache on front, by default ...
Merge branch 'master/0.2' into dev
Merge branch 'dev' of git://github.com/novius-os/core into dev