enabling Boost in CMake and include it for example

to use Boost headers just include '3rdparty_INCLUDES'

Signed-off-by: Torbjörn Klatt <t.klatt@fz-juelich.de>
travis: adding Boost as prerequirements

Signed-off-by: Torbjörn Klatt <t.klatt@fz-juelich.de>
I should not only add the PPA but also install the Boost(er)

Signed-off-by: Torbjörn Klatt <t.klatt@fz-juelich.de>
Merge pull request #6 from torbjoernk/feature/cmake-boost-travis

adding Boost to CMake and fixing up Travis