updated visitor interfaces to use const pointers
add v2p5p0 updates
updated iterator tags
add Alex's updates
updated return statement
updated logic during error
added exact explicity as a dist type
added sweep overload for Overlapping bed distance type -> deal with bug when --faster is utilized
removed weighted mean for now
removed junk
Reverting to the state of the project at 36e1902
removed boost dependencies and boost itself
merged branch v2p5p1