Framework for TripPathBuilder.
Check for duplicate vertices in Clipper. Update polyline tests
to take expected vertex count and improve vector initialization
Update vectr initialization
new configs.
added -lboost_filesystem -lboost_system to pbfgraphbuilder
updated to use class variables:  node and way scripts and functions for lua. Also added missing accessor funcitons.
added logic to use boost options.
Merge pull request #47 from mapzen/dwn

Framework for TripPathBuilder
added libboost-system-dev and libboost-filesystem-dev
reverted.  We are already using libboost-all-dev.
added m4's for boost_filesystem and boost_system.
attempt to get proper boost version in travis
Merge pull request #48 from mapzen/graph_configs

Graph configs
Merge remote-tracking branch 'origin/master' into kk_loki
change config for tile builder so that we could add postgres hooks easily. moved parsing of config to respective dataparsing class. changed around binary to be thin shell on top of that. added in tile hierarchy config so that other processes (loki) can access the same config info to know what tiles should be on disk