Comprehensively normalize labels that resulted from earlier migration

[hlapp]

The v1.0 version of CDAO used term IRIs that were constructed from (semi) human-readable labels. In the course of migrating these to OBO-style opaque term IRIs (see 2012-06-06 release) the term identifier hash-suffixes were converted to labels using CamelCase.

These labels should be normalized to separate words by spaces, dashes, or other applicable delimiter, and with appropriate upper/lower case. (See #10 – addressing #2 – as an example.)

Such a change should not obsolete any term, since the semantics of the corresponding terms is not changing at all.