Revert "doppelclick_time: Object for storing timing information"

This reverts commit 163aa73571f793c3455273d243c4c3498d6c6a1a.
doppelclick: Refactor names of images
Merge branch 'dev' of github.com:LehmRob/doppelclick into dev

Conflicts:
	doppelclick.cpp
doppelclick: Refactor slot naming
doppelclick: Add Macros for time values
doppelclick: Add layout for difficult settings