Added podspec for ReactiveCocoaLayout 0.3
Added podspec for ReactiveCocoaLayout 0.3.1
Added pospec for Archimedes 0.2
Updated ReactiveCocoaLayout podspecs to eliminate build warnings/errors.
Merge pull request #1936 from DinosaurDad/master

Added podspecs for ReactiveCocoaLayout 0.3 and 0.3.1, Archimedes 0.2