cmake: add find odb

- obtained from https://gist.github.com/davideanastasia/4952948
agile: groom release notes adding spikes from pfh work
cmake: detect pfh and disable system headers
cmake: enable c++ 11 directly in the project

For some unknown reason we were relying on PFH to setup C++ 11
mode. Now we do it directly.
utility: handle the move of empty deleter between boost releases

We include empty deleter from the right place depending on the boost
release. This avoids the deprecated warning when building on boost
1.55.
agile: backlog Use xtime-like stopwatch in selected places to log timings
add option to disable eos serialisation support

- fix spelling of roundtrip type test
- regenerate all models with EOS serialisation off
- split EOS serialisation support from the main serialisation canned
  test
generate dogen models without EOS support
valgrind: update suppression file after boost log v2 update
cmake: add odb related projects only if odb is present