Thanks for your extensive feedback.
Regarding the requirement about the version aligning, I agree that it is a little misleading and we are going to change it. What you need is to have a compile sdk version of at least 21, since we are using features that have been introduced with that version in our controls. Additionally, you will notice that Android Studio will warn you about the necessary "alignments" like "Target sdk should not be higher than compile sdk" and "The support library should not use a lower version than the target sdk version".
Android Studio did not actually change dramatically the way the projects are structured, it simply changed the way they are visualized by default. Now they are shown in a Android view which you can change to Project view so that your project is visualized as in our documentation (as shown in the attached image).
We are going to extend the getting started with eclipse documentation article so that it is easier to follow with Eclipse Luna as well.
The documentation will be updated by the end of the week. Don't hesitate to write us back if you notice anything else that is incorrect, misleading or if you simply think that is not clear enough.
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