Merge pull request #1 from RobertMcDermot/master

Merge from master
added getLadders() and getWalls()
Merge pull request #2 from RobertMcDermot/master

added getLadders() and getWalls()
added information from the streets' source xml files
Merge branch 'master' into gh-pages
added the main street image alongside the preview image
Merge pull request #4 from RobertMcDermot/master

added getLadders() and getWalls()