Merge pull request #421 from ngodfraind/master

Adding files_path to behat config.dist.
Added missing file checks
Used stable constraint for mink
Fixed command calls
Added post update script
Added cache clear script handler
Updated installation instructions
Merge pull request #443 from stefk/cache-clear

Adding post update and cache clear scripts
Moved assets install back to composer.json
Removed refresh command from update procedure
Updated bundle recorder version
Merge pull request #445 from stefk/bundle-recorder-update

Updated bundle recorder version
Update composer.dist.json
Fixed raw install script (closes claroline/CoreBundle#370)
Updated core and web installer versions
Merge remote-tracking branch 'upstream/master'
Fixed cache-ttl value type
Adding maintenance file in the .gitignore file
Merge pull request #446 from maxailloud/add_maintenance_file_in_gitignore

Adding maintenance file in the .gitignore file
Documentation update