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I Bike CPH version of the Open Source Routing Machine (OSRM)

The "I Bike CPH" bike routing service uses a custom version of OSRM, which computes shortest paths in a graph. We modified OSRM bit to better support bicycle routing:

• Provide an additional flag for each instruction, indication where you need to push the bike
• Support parsing of bike route in the LUA profile.

We hope to get these changes merged back into the OSRM mainline repository.