Scrolling inside the canvas will affect game zoom level, while scrolling
outside the canvas will scroll the webpage
Merge pull request #26 from Seneca-CDOT/issue19

Scrolling inside the canvas will affect game zoom level, while scrolling
Zoom in now supports the '='/'+' key hybrid
Merge pull request #27 from Seneca-CDOT/issue22

Zoom in now supports the '='/'+' hybrid key
changes/fixes to Graph and Node
Graph object generation from XML file complete.
Structure drawing complete.
Edge drawing - Soon(tm)
Road drawing completed
conflicts