fs_utils: exception safety in utility functions (TRIVIAL)
PLAT-765: implemented "operator +" for TimePeriod (TRIVIAL)
PLAT-766: test answers Jeremy's question

  J: Does TimePeriod t; t += "1s"; work?
  W: Let's ask our tests
  T: Yes, it does!
added binPath variable to launcher so we can specify where the binaries are
HttpClient now uses 1024 maximum http connections by default
Merge branch 'master' into http-client-ih