Moved AbstractCS.forUnit(...) to the internal implementation of AxesConvention.NORMALIZED.
If we want to provide the functionality of 'forUnit' in public API in a future SIS version,
we will be better to do that in an ReferencingObjectBuilder class instead.


git-svn-id: https://svn.apache.org/repos/asf/sis/branches/JDK7@1558364 13f79535-47bb-0310-9956-ffa450edef68