first version of a widget that draws lines between "connected" objects on the map
allow limiting of lines through highlight / selection events
BugFix: use attached Widgets (instead of "hard-coded" first on)
generate lines through column matching
improve line drawing speed (still lacking)
example object matching (if they are of the same type)
speed improvements (now ok-ish)
redraw lines on zoom
check opposite direction of lines too
BugFix: only check for reflexivity if it is really there (if dataset AND column match)
draw arrows (pointing at line end)
allow subsets of line (inbound, outbound) on selection
add option to only show lines of highlighted or selected objects
allow comma separated list of values in matching function
BugFix don't ommit "bidirectional" arrows
on multiple lines between circles: increase line width
make arrows more visible
don't initialize lines array on startup
use real coordinates (shift is always WGS84 lat/lon, so a conversion would be needed)
Merge branch 'origin/master'

Conflicts:
	js/Build/Loader/Loader.js
	loader.html