Move AddressBook out of Cocoa module into AB module.

AddressBook name is already taken by the framework.
Merge pull request #50 from declaresub/master

Move AddressBook code out of Cocoa module into its own AB module.
Merge pull request #28 from macoslib/master

Merge changes
Various

- Changed FileManager code to utilitize FolderItem.NativePath functions
in Xojo.
- Changed FileManager.NativePath from Global "extends" function to
Public with parameter.
- Changed local variable declarations in two methods from "str" to "s"
to avoid confusion with the native function Str.
Merge branch 'macoslib-master'
Added pragmas for unused variables

Incremented version to 138.