[RFC - Python Scripting] New method Objfile.symtabs () - docs included

[Paul_Koning@Dell.com]

In this patch, you have an iterator that walks over the symtabs for an objfile, but that is only used internally in the symtabs() method which is written to return a list.

How about having symtabs() return the iterator instead?  An iterator is usually just as good as a list (and more efficient); in the rare cases where you actually need the list, simply doing list(objfile.symtabs()) will do that.

	paul