coursier/coursier v1.0.0-RC4 on GitHub

Better support for Maven snapshot versioning (thanks to @rfkm, #581)
Add basic support for multiple version ranges (like [1.0,2.0),[3.0,4.0), #581)
Fix support for version ranges for sbt plugins from Maven repositories (#581)
Support sbt 1.0.0-M6 (replaces support for 1.0.0-M5, #560)
Have boostraps use the main coursier cache (#576)
More slick tree printing (thanks to @sschuberth, #574)
Better support for version ranges like 1.2.3-+ (thanks to @avdv, #556)
New sbt-pgp-coursier plugin, to download sbt-pgp checksums via coursier (#571)
(Even) more careful handling of HTTP connections (#568)
Don't fail if another coursier run downloads a file concurrently - watch the concurrent download instead, report its progress, and take over it if it gets interrupted (#568)
Switch to scala-js 0.6.17 (#565)
Ensure Nexus proxies (Nexus 2 and 3) support is fine (some regressions in 1.0.0-RC1, fixed in #554)
Don't mix resolutions of distinct Ivy configuration subgraphs in sbt-coursier (allows neo-sbt-scalafmt 0.2 to be fine with sbt-coursier, #554, and extra non regression test in #572 by @dotta)
Add support for binary checksum files (#554)