Update debian/control

Fixes the following error:

CMake Error at /usr/share/cmake-2.8/Modules/FindBoost.cmake:1195 (message):
  Unable to find the requested Boost libraries.

  Boost version: 1.49.0

  Boost include path: /usr/include

  The following Boost libraries could not be found:

          boost_filesystem
          boost_system
Merge pull request #1 from euroelessar/master

Update debian/control