PostgreSQL support
Update composer.json
Revert "Update composer.json"

This reverts commit 9ad8fddd34115378de3e6bf96be36c9e0cac2093.
Merge pull request #12 from imanzuk/master

PostgreSQL support
PostgreSQL support doc update
Merge pull request #13 from imanzuk/master

PostgreSQL support doc update
Update composer.json
Update composer.json
Update composer.json
Update composer.json
Update composer.json
hhvm added to travis
Gaufrette bundle version updated
Minimum stability flag removed
Merge pull request #18 from eymengunay/gaufrette-fix

Gaufrette fix
Fixed cleanUp problem
Merge pull request #19 from dafuer/master

Fixed cleanUp problem
postgres private var was missing
Added backup folder system
Merge pull request #20 from dafuer/folders

Folders backup