Added accumulator method (untested)
added outline for accumulator test
Merge branch 'accumulator' of github.com:SEL-Columbia/networkplanner.R into accumulator
Working/tested accumulator
Merge pull request #15 from SEL-Columbia/accumulator

Accumulator
Merge branch 'master' of github.com:SEL-Columbia/networkplanner.R into coor_mtx
comment out adj mtx function for now