Merge pull request #21 from austinglaser/14-back-out-hardcoded-mdbook-version

Use latest mdbook version in CI

Author: therealprof

ci/install.sh

@@ -3,11 +3,10 @@ set -euxo pipefail
 main() {
     local tag=$(git ls-remote --tags --refs --exit-code https://github.com/rust-lang-nursery/mdbook \
                     | cut -d/ -f3 \
-                    | grep -E '^v0.2.[0-9]+$' \
+                    | grep -E '^v0\.[0-9]+\.[0-9]+$' \
                     | sort --version-sort \
                     | tail -n1)
-    # Temporarily use older version until packages are available for 0.2.2 (or newer)
-    local tag="v0.2.1"
+
     curl -LSfs https://japaric.github.io/trust/install.sh | \
         sh -s -- --git rust-lang-nursery/mdbook --tag $tag