Commit for Release 1.0

This release introduces the following changes:

- New CSV structure
- Release Notes in the README.txt file
- a merge script to have all documents into one.
Reference to Open Enumerations document in README.txt

The reference points to redmine repository where the document
"Proposals and Best Practices for Open Enumerations" is
Merge script for release 1.0

This script merges *_t.csv and *_t-draft.csv documents in two bigger
documents for ease of use.