- turns off "lit" for the maps
- adds a parameter "mapZoom" to select an zoom level for the background map in stcube
- extends normalize function
- normalize "day" normalizes now to hours in a day, not relative to a specific date, analogously "week" to day of the week, ...
Merge branch 'master' of https://github.com/BenGraeler/trajectories

Conflicts:
	R/Tracks-methods.R