more clear var name and fixed typos
Fixed bug in selecting disconnected root nodes and adding non-network nodes to graph
Added FID to lines (kind of invasive)
Bug fixes and refactoring associated with FID pass through and non-grid vertex inclusion
added doc
added more doc
Updated vertex field names to be more clear and somewhat consistent with existing networkplanner field names
cleanup
Cleaning up documentation
Updated documentation and added sample plot
added img link
Merge pull request #42 from SEL-Columbia/add_off_grid

Add off grid.  Looks good :)