Dbb-ranking-parser

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Released March 10, 2016

- Allowed to specify the HTTP server's host and port on the command
line.
- Fixed `Dockerfile` for the HTTP server to bind it to a public address
instead of localhost so that `EXPOSE`ing it actually works.

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Released March 8, 2016

- Added HTTP server that wraps the parser and responds with rankings as
JSON.
- Added `Dockerfile`s for the command line script and the HTTP server.

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Released March 6, 2016

- It is now sufficient to specify just the league ID instead of the full
URL. The latter is still possible, though.
- Added a command line script to retrieve a league's ranking as JSON.
- Return nothing when parsing irrelevant HTML table rows.
- Return extracted ranks as a generator instead of a list.
- Split code over several modules.

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Released March 5, 2016

- first official release