Run test tasks in parallel according to RUST_THREADS. Issue #734
Auto merge of rust-lang#734 - humenda:l4re-improvements, r=alexcrichton
Merge pull request rust-lang#734 from FractalFir/remove_needless_attr
Implementation of Negative Log Likelihood Loss Function (rust-lang#734)
Merge rust-lang#818
Merge rust-lang#837
Merge pull request rust-lang#734 from RalfJung/readme