added application of reference data points filters for ICPSequence objects
Merge branch 'fix/issue56' of https://github.com/kruesip/libpointmatcher into kruesip-fix/issue56
add unit test for ICPSequence
Remove compilation warnings (finally...)
Merge branch 'kruesip-fix/issue56'
Merge branch 'master' of github.com:ethz-asl/libpointmatcher