Create Recognizer class

We want to create a Recognizer class, which holds all options for the various findXYMarker-functions and dispatches a call for getMarkerPos accordingly by calling the currently selected function with these parameters.

added medium recognition refactoring labels

mentioned in issue #123

created merge request !108 (merged) to address this issue

mentioned in merge request !108 (merged)

assigned to @d.kilic

closed with merge request !108 (merged)

mentioned in commit 78325885