Importing ART implementation
Adding the ability to clone an ART tree
Adding tests for art_copy
Fix the insert_copy_delete test
Replace hashmap with art_tree in set manager
Fixing unused value
Remove the hashmap implementation
Add support for listing sets by prefix
Update for new set interface, list now supports prefixes
Adding test for list with prefix
Avoid flushing empty sets over and over
Add a test for listing with prefix
Updating changelog
Add the git sha