Only do work in -rac_description in DEBUG builds
Avoid -rac_description within -description

Since it now doesn't do anything in Debug builds.
Merge pull request #549 from ReactiveCocoa/skip-rac-description-in-debug

Only run -rac_description in DEBUG builds
Set iOS deployment target to 5.0
Add SDK requirements to README
Clean-up duplicate entries in ReactiveCocoaTests
Merge pull request #552 from kastiglione/pbxproj-cleanup

Clean-up duplicate entries in ReactiveCocoaTests group
Merge pull request #551 from kastiglione/document-sdk-requirements

Document sdk requirements and set iOS deployment target to 5.0
Merge branch 'master' into racobservablepropertysubject-custom-keypath-handling