Doc for Layout of .osrm.xxx files

[wangyoucao577]

I'm starting to write doc for layout of .osrm.xxx files since there's only a toolchain overview currently which is not detail enough. It's helpful for me, and I also hope it can be helpful for other people to understand the underlying structure layout.
There're a lot of .osrm.xxx files, understand and write details for them will take time. We may work on them one by one.

Here's the first doc for .osrm: https://github.com/Telenav/open-source-spec/blob/master/osrm/doc/osrm-toolchain-files/map.osrm.md

Also, a command line tool osrm-files-extractor has been created to load/view the contents. It implements by golang, you can build it by your self with latest go 1.13 or get it by docker if you'd like to have a try:

docker pull telenavmap/osrm-backend
docker run -it --entrypoint /osrm-build/osrm-files-extractor telenavmap/osrm-backend

If anything not correct or any suggestions, please feel free to ask. Thanks!

[wangyoucao577]

A lot of files have been done in https://github.com/Telenav/open-source-spec/blob/master/osrm/doc/osrm-toolchain-files. Will continue for more. Close the issue since nothing need to do with it.