Moves ensure block to end of processing
Merge pull request #82 from RealDigitalMedia/fix-sinatra-context

Moves ensure block to end of processing during rack middleware
Update changelog
Fix undefined method in rails < 3.1

`ActiveRecord::Base.connection_config` doesn't exist prior to Rails
3.1. Fixes #81
Remove all lowercase keys from cgi_data.

We don't use anything except for the server ENV keys, such as
HTTP_USER_AGENT.
Require api key to be public

This prevents server communication when the api key hasn't been
configured, such as in rake tasks when ENV isn't available (See #79).
Automatically fork worker after Unicorn forks.
Add some more specs around Trace.instrument
Fix 1.8.7 specs
Fix Rails 2.3 specs
Don't depend on configuration to instrument net/http
Fix rails feature
Ruby 1.8.7 and 1.9.2 are no longer supported.
Add a stronger Ruby EOL warning to the README.
Merge branch 'master' into short_queries