Cleanup old gem directories when upgrading Ruby.
Merge pull request #218 from bryantraywick/cleanup-old-gem-directories-when-upgrading-ruby

Cleanup old gem directories when upgrading Ruby.
Upgrades the 'blessed' version of passenger to 4.0.45
Merge pull request #219 from railsmachine/kplawver-passenger-4.0.45

Upgrades the 'blessed' version of passenger to 4.0.45
Fixes src193railsexpress install on Ubuntu 12.04.
Merge pull request #220 from bryantraywick/fix-src193railsexpress-install-on-ubuntu-12.04

Fixes src193railsexpress install on Ubuntu 12.04.