Reword an awkward sentence in the README's requirements

I flip-flopped a bit between this and "Only allow endpoints clearly defined through Moya to be accessed through Moya", but this one seems more precise to me.
Merge pull request #71 from interstateone/MinorReadmeWordingChange

Reword an awkward sentence in the README's requirements
Fixed a minor bug that prevented compilation of the sample.
Merge pull request #72 from juhagman/master

Fixed a minor bug that prevented compilation of the sample.
Updated README for Xcode version.
Added documentation.
Fixed spacing issue.
Merge branch 'master' of github.com:AshFurrow/Moya
Merge pull request #75 from AshFurrow/docs

@orta => Documentation
Moved to CocoaPods.
Updated README for Travis-CI badge.
Removes host app from test targets.
Merge pull request #77 from ashfurrow/ci

@orta => Continuous Integration
Updates with CocoaPods instructions.
Merge pull request #79 from ashfurrow/instructions

@orta => Updates with CocoaPods instructions.