custom-scheduler factor-out-futures flat-combine issue-431-rayon-spawn master nikomatsakis-relative-links seq-to-par-pipeline staging top-level-docs trying v0.7

v1.0.3 v1.0.2 v1.0.1 v1.0.0 v0.9.0 v0.8.2 v0.8.1 v0.8.0 v0.7.1 v0.7.0 v0.6.0 v0.5.0 v0.4.3 v0.4.2 v0.4.1 v0.4.0 v0.3.1 v0.3.0 v0.2.0 rayon-futures-v0.1.0 rayon-core-v1.4.1 rayon-core-v1.4.0 rayon-core-v1.3.0 rayon-core-v1.2.1 rayon-core-v1.1.0