CocoaPods 0.36

Initial Draft for the blog post about the upcoming release.

#### TODOs
* [ ] Review, stylistic improvements, fix typos, …
* [ ] Add the assets
* [ ] Update **pygments.rb** to a version, which brings a lexer for Swift
I don't know if it's in that paragraph that we should mention it or some other place, but I feel like we should also talk about `@IBDesignable` and `@IBInspectable`.

Using frameworks for pods allows us to use those directives, so that pods that provide UIKit components can now render themselves live in IB, so this is a great feature we also get by migrating CocoaPods to frameworks.