Package-level declarations

This rule connects nodes that are within maxRange distance, but only if there are not too many obstacles separating their line of sight. The base idea is that line-of-sight distance and routing distance should not differ "too much", as captured by tolerance. tolerance measures the maximum allowed relative difference between the line-of-sight and the route distance. It's default 0.1 (10%) means that if LOS-distance is more than 10% shorter than route-distance, then the nodes are considered disconnected. Route distance is taken two-ways (to account for one-way roads) and the shortest one is considered (wireless signals do not need to follow one-way roads).