Guard potential unavailability of NSStreamNetworkServiceTypeCallSigna…

…ling.

Bump pod version to 0.5.1

Bump pod version to 0.5.0

Merge pull request facebookincubator#290 from mogstad/carthage

Add dynamic framework for iOS

Bump pod version to 0.4.1

Merge pull request facebookincubator#253 from square/dimitris/version

Update version number to 0.4

Updating podspec

Bumping PodSpec for version bump

Bumping podspec version for tagging

Updating test results