Does a static library add inside another static library? iOS/Xcode

Does a static library add inside another static library? iOS/Xcode

I'm creatic a static library to distribute to other projects (they don't
see the library source code), and I wonder some questions:
-I follow this guide:
http://developer.apple.com/library/ios/#technotes/iOSStaticLibraries/Articles/creating.html
I create a .a file, several .h files and another .bundle file. The
question is that my project library uses includes ResstKit (and uses it).
In the product directory I see my library .a and the RestKit .a file. Do I
have to distribute that restkit .a file? or is it already included inside
my own .a file?
-The Apple guide doesn't say anything about fat or universal libraries.
How can I create my library for the device and simulator at the same time?
I see some scripts on the net, but I guess there must be some option
there. What do you think? (BTW, do fat and universal have the same
meaning?)
-Is there anyway to tell the target zip everything or create a DMG
package? I guess using a Python script is possible, but I mean using any
Xcode option.
Thanks in advance.