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Merge pull request barryvdh#121 from Anahkiasen/remove

Remove useless .gitkeep

Catch exceptions when no DB available

Fixes barryvdh#115

Better laravel icon

Make logs also pretty

Set isString to false

Update screenshot

Extend QueryCollector from PDOCollector

To inherit widget assets etc (without having to upgrade)

Don't use helpers, use $app

Loossen constraints

Revert to the old format style. This wil still work (but deprecated),
but prevents conflicts because of raveren/kint. Fixes barryvdh#109

Set fixed composer version

Fixes barryvdh#109