Revert "travis does not seem to have boost 1.55 packaged"

This reverts commit 43a1990023841f777ee1f0bc8c1337e947e78f49.
Revert "increased libboost-version as an attempt to build"

This reverts commit c0ed528c2fe5f8ce862786d346f201e7292e313d.
added changes suggested by ax3l