[Tile-serving] [osm2pgsql] rework projection code (#527)

[Sarah Hoffmann]

- make use of osmium's proj wrapper CRS
- use virtual functions instead of switching over projection
- remove duplicate code (mainly WSG84 to mercator transformation)
- use custom projections also with --proj 4326 and 900913 (fixes #514)
You can view, comment on, or merge this pull request online at:

  https://github.com/openstreetmap/osm2pgsql/pull/527

-- Commit Summary --

  * rework projection code

-- File Changes --

    M geometry-processor.cpp (2)
    M options.cpp (10)
    M osm2pgsql.cpp (4)
    M output-gazetteer.cpp (8)
    M output-pgsql.cpp (9)
    M parse-osmium.cpp (9)
    M reprojection.cpp (258)
    M reprojection.hpp (72)
    M tests/test-options-parse.cpp (26)
    M tests/test-output-multi-line-storage.cpp (2)
    M tests/test-output-multi-poly-trivial.cpp (2)
    M tests/test-output-multi-tags.cpp (2)
    M tests/test-output-pgsql-area.cpp (2)
    M tests/test-output-pgsql.cpp (4)
    M tests/test-parse-diff.cpp (2)
    M tests/test-parse-xml2.cpp (2)

-- Patch Links --

https://github.com/openstreetmap/osm2pgsql/pull/527.patch
https://github.com/openstreetmap/osm2pgsql/pull/527.diff

---
Reply to this email directly or view it on GitHub:
https://github.com/openstreetmap/osm2pgsql/pull/527
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