Auto-update settings for Xcode 7

Bumped version to 3.8.2

Updated the changelog

Readded `shouldUseCredentialStorage` to preserve backwards compatibility

Updated the changelog

Bumped version to 3.7.5 and added to changelog

Updated Changelog and added Changelod to workspace

Fix: xcodebuild: error: -destination implies architecture, -arch must…

… not also be specified.

Bumped podspec version