You can clone with
HTTPS or Subversion.
These wiki pages contain some extra information about CamanJS that you may find helpful. Feel free to add any information you think may be helpful to others.
There is a full in-depth guide to CamanJS on the official website.
There is a benchmarking program that comes bundled with CamanJS that lets you see how quickly it can run any filter on your computer. Be sure to check out the Benchmark Results page.