Update readme to reflect current use.
jruby latest is 1.7.2, ruby is 1.9.3-p362
Add a scraping script to get the latest jruby/ruby/perl versions.
Add a smoketest to use the scraper to validate I am installing the latest versions.
Update smoketest for jruby to 1.7.2
Update smoketest for ruby to 1.9.3-p362
Update smoketest scripts to do 'orb use foo'/'opl use foo'
Copy the user .orb/cache for smoketests to speed things up.