Add more bridge definitions for various roads and railways

Add bridge definitions for highway=living_street, highway=steps,
railway=funicular, railway=miniature, railway=preserved,
railway_INT-preserved-ssy, and railway=monorail.

This solves #190 on Github and 3852, 4318, and 4610 on trac.
Merge pull request #394 from math1985/bridges

 Add more bridge definitions for various roads and railways