prevent deleting default language. Fix #759
prevent deleting default currency
check admin login lenth during install process
don't save image or document in database if it is impossible to copy on disk. Fix #743
implement new test for default currency and language deletion
update cheque module installation
use event dispatcher for module activation in commands
remove thelia's glyphicons less
prevent the move of product or content to top level
fix cs
Merge pull request #767 from lunika/prepare_alpha

Prepare alpha