Merge pull request #334 from indirect/master

use gem list -i

script/bootstrap

@@ -5,7 +5,7 @@ set -e
 
 # FIX: only sudo if gem home isn't writable
 
-(/usr/bin/gem spec bundler -v '~> 1.3.0' > /dev/null 2>&1) || {
+(/usr/bin/gem list -i bundler -v '~> 1.3.0' > /dev/null) || {
   /usr/bin/sudo -p "Need to install Bundler for system ruby, password for sudo: " \
   /usr/bin/gem install bundler -v '~> 1.3.0' --no-rdoc --no-ri
 }