boost Requested version was 1.48 @ubuntu 12.04.2

```

CMake Error at CMake/FindBoost.cmake:916 (message):
  Unable to find the requested Boost libraries.

  Boost version: 1.46.1

  Boost include path: /usr/include

  Detected version of Boost is too old.  Requested version was 1.48 (or
  newer).
```

please update docs, how to build
