aj noted that our docs describe how recursor statistics add up badly, fixed
travis: put full path in CC and CXX variables so clang even works under the limited PATH sudo gets - needed due to our spurious rebuilding of version.o, even on 'sudo make install' after a build
travis: change to dynmodule testing, to differentiate from Jenkins where we do static module testing. Use 'make install' to make the libs easy to find during testing.
travis: log *backend.so libdeps
Make sure geoipbackend pulls in the yaml and geoip libs when loaded dynamically, thanks @rubenk