[Post] Add draft of CocoaPods 0.35 release post

\c @orta @alloy
> …will now only be considered in the resolution process if there is any dependency on the pod with a pre-release version in its requirement.
>
> Thus, if you want a pre-release version, such as a beta, you will have to specify that in your Podfile, like so:
>
> [EXAMPLE]