Bump ruby version to 2.1.2
Migration for bikeways table
Set up associations between bikeway and bikeway_segment

sherbourne = Bikeway.first
segment = sherbourne.bikeway_segments.first

sherbourne.bikeway_route_number # => 29
segment.kml # => <Geom....>
Minor refactor to move shared functionality out of rake task
Revise previous refactor (move to BikewaySegment, not FeatureWalker)
Show debug information even if there's only one portion.
Add /bikeways route, controller, etc for simple navigation