[Tile-serving] [osm2pgsql] Add cmake build scripts and appveyor.yml (#460)

[alex85k]

One more thing:
  - with my self-made Boost linking to ``rt`` system library was needed. Cmake did not determine it.
```
thread.cpp:(.text+0x5e5): undefined reference to `clock_gettime'
``` 
Lua needed it too and also -ldl... Had to add linker flags manually
```
  -DCMAKE_EXE_LINKER_FLAGS="-lrt -ldl" 
```
I guess this should be fixed in cmake, but do not know how.

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