Merge branch 'release/0.23.1' into development
Make RestKit.h importable with standalone subspecs
Fix Subspec Headers
set RKCoreData.h to public group in copy header build phase
Merge pull request #1909 from MBulli/development

Set RKCoreData.h to public group in copy header build phase
Issue #1912: RKPathMatcher not imported
Merge pull request #1915 from FWDaniel/daniel/importbug

Issue #1912: RKPathMatcher not imported
Ignore *.xccheckout files