Initial commit.
Fix speed issues by using bespoke linear algebra operations.
Clean up debug statements and method names.
Add comments. Make reliance on SparseColumnMatrix explicit.
Add tests for MathUtils.
Fix serialization test. Delete app classes and tests.
Rename package to com.github.maciejkula.dictionarylearning.
Fix removal of elements during iteration while regularizing.
Speed up A'A calculations. Add A'A caching to LSMRTransformer for faster projection calculation after training.