I'm pretty new to the Cocoa programming, and I am curious about what the different libraries are to create in XCode. Suppose I want to start a library project called X. If I choose dynamically linked library, it builds libX.dylib; if I choose static library, it builds libX.a; if I choose bundle, it builds libX.bundle. What are these things and what is the difference? Should I just create all seperate class files on my own and then tie them together via a single header file libX.h that just imports them? TEACH ME! 
