Update README.md

Added about maven
Added asymmetric and binning methods.
Merge branch 'master' of https://github.com/rcsb/symmetry
Fixed bug #11 (minus sign in residue range).
Updating POM dependencies and adding log4J as dependency.
Doing logging correctly.
Adding log4J config file.
Adding a simple method being used in symmetry-benchmark.
Fixed test resource writing in CensusTest and added a missing test
resource that was being recreated by ProtodomainTest. Both were causing
a build failure.
Merge branch 'master' of https://github.com/rcsb/symmetry
Simplified testing for Census by using XMLUnit.
Cleaned up CensusTest. Why was I doing it that way?
Merge branch 'master' of github.com:rcsb/symmetry