Adds Morton code calculater.
Completes morton code calculation
Refactors MortonCode.

Faster and cleaner implementation. Better unit tests.
Improved documentation.
Better JavaDocs, en minor refactoring of MortonCode.

Removed some duplication in calculations, and introduced more
consistent naming.
Merge branch 'master' of git://github.com/maesenka/geolatte-geom into maesenka-master-mortoncodes