* Add port of tree-similarity to measure tree edit distance
* Fixed database version
* Fix version again
* Trying to fix the database version issue again
* Update tree-similarity to v0.2
* Added tree-similarity v0.2
* Use official repo to download the library (PR got merged); Clean up versions
* Update version manifest
* Update download hash
* Update version manifest
* Align version string with upstream repo release tag
* Update version manifest to align with upstream release tag
* Update to release 0.1.1 that installs only the header files
* Update version manifest