Revised README to correct typos, caveat the counter layer, add description of the bulk-loader.
directory and subspace

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branch : feature-directory
Layers that previously used subspaces for testing now use directories under 'tests';
directory layer when run as a script prints the directory tree;
Obsolescence note for high contention counter layer.

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branch : feature-directory
api_version(100) for everyone
relicense MIT
Revised Directory Layer and Subspace module.

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branch : feature-directory
README: Added entries for directory and subspace, and tweaked caveat on counter layer.

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branch : feature-directory
merge from feature-directory; fix a few links to the new 1.0 website