Merge pull request #23 from escherba/dev

newer code version
Merge pull request #24 from escherba/dev

use sketch similarity thresholds when clustering
Merge pull request #25 from escherba/dev

clean up test_files
Merge pull request #26 from escherba/dev

move hdc clustering into its own file
Merge pull request #27 from escherba/dev

move HDClustering back to test_files
Merge pull request #28 from escherba/dev

fix manifest
test hd clustering on simulated dataset