Added an abstract command line service factory.

Use this factory to create services and easily add subscribers based on options.
Added an abstract command line service factory.

Use this factory to create services and easily add subscribers based on options.
merge remote-tracking branch 'origin/develop' into feature/CULUDB-1
Remove unused use statements
Merge pull request #1 from cultuurnet/feature/CULUDB-1

Add base service factory