Fix Bike Rental and REST url for leaflet-client

I think the following patch is good -- it fixes some issues I was having deploying origin-0.11.x with a basic miami OSM extract graph and dynamic city-bikes API with routing.

+ Remove /ws prefix from webapp URL as expected by leaflet-client

It looks like the leaflet-client expects a particular tomcat deployment and does NOT (by default) include the /ws/ prefix for API calls -- So, remove it from the WEB-INF web.xml filter-pattern (for rest-servlet) so that all you have to do is match your tomcat deployment to the expected (/otp/) and the leaflet-client will communicate with the rest-servlet.

Alternatively, we could correct the leaflet-client to expect /otp/ws/ 

+ Add BICYCLE_RENT as an option (again) so bike rentals will be used.

For some reason, the BICYCLE_RENT option for rented bicycles was removed from the leaflet-client transitoptionswidget.js - so, this patch simply adds it back.  It looks like there may be some more work done with this in master/1.0.x to allow a more modular approach to enabling transit modes ("with bike share", etc), but until then it seems appropriate to add the available options so that even though a user correctly configures the graph and API endpoints (via graph.properties) OTP would never use bike rental stations because "allowedBikeRental" would be false within routing/edgetype/StreetBikeRentalLink.java.

I hope that is detailed enough and the patch(es) are helpful to the project!

Any comments and feedback is welcome.

Thanks