Timelapse dynamic year, and styling of dock

Added: Slider to manipulate year in a dynamic way.
Added: Styling for map dock.
Added: Setting start year according to earliest conflict, also for
yearslider
Added: Timelapse performance tweaks
Needed: Mapdock responsiveness
Comment: CSS is acting up when determining widths. White space caused by
skeleton css set to 0 now, but there is still some hidden margins in
play.