Merge pull request #347 from tzz/reindent

reindent sketches/**/*.cf
Check for history support to avoid breakage when the readline module is not installed. Fixes #336
Merge pull request #349 from zzamboni/fix/check_history_support

Check for history support to avoid breakage when the readline module is not installed. Fixes #336.
tools/test/vagrant: add Ubuntu 10.04 i386 image to boxes.rb