Sets @codec when Infinispan is not available. Fixes undefined method `encode' for nil:NilClass
Use rackup script file for Rails 2 applications, if it exists
Merge pull request #164 from dwbutler/cache_codec_fix

Fix Torquebox::Cache when Infinispan is not available
Merge pull request #165 from pazustep/rails2-rackup

Use rackup script file for Rails 2 applications, if it exists