Merge pull request #799 from github/update_version_in_bootstrap_script

Update `script/bootstrap` to recommended Go and Ruby version

script/bootstrap

@@ -18,14 +18,14 @@ fi
 STATUS=0
 
 if ! go version; then
-  echo "You need to install Go 1.2 to build hub" >&2
+  echo "You need to install Go 1.4.1 or higher to build hub" >&2
   STATUS=1
 fi
 
 { ruby --version
   bundle install --path vendor/bundle -j 4
 } || {
-  echo "You need Ruby 2.1 and Bundler to run hub tests" >&2
+  echo "You need Ruby 1.9 or higher and Bundler to run hub tests" >&2
   STATUS=1
 }