Merge pull request #37 from spastorino/use-installed-nightly-if-available

This make the last failure be the default installed nightly if any

Author: spastorino

Cargo.lock

@@ -19,7 +19,9 @@ flate2 = "1.0.1"
 git2 = "0.8"
 log = "0.4"
 pbr = "1.0.0"
+regex = "1.3.1"
 reqwest = "0.9"
+rustc_version = "0.2"
 structopt = "0.2.5"
 tar = "0.4"
 tee = "0.1"