ARQGRA-423: Interceptor getPrecedence method added
ARQGRA-420: Porting screenshooter into Graphene

* initial porting done
* just copying to extension/screenshooter
ARQGRA-420: cleaning screenshooter pom.xml dependencies versions
Added white list for taking screenshot on every action

* when on every action = true, then screenshots are taken only when
  interceptored method is from WebDriver class
screenshooter: improvements in configuration and naming screenshots

* toString added to screenshooter configuration
* naming of the screenshots adjusted to take into account also when
  taking screenshot manually
screenshooter: removed developers and prerequisities from pom.xml
screenshooter: version changed to 1.0.0.Alpha2
Merge pull request #98 from jhuska/ARQGRA-420

Porting Screenshooter into Graphene