Added compatibility layer for Shell/ipapi/iplib....
Added compatibility layer for Shell/ipapi/iplib.
These 3 top-level modules have been moved to core. But, to ease the
transition to their new location, we have re-created these modules
at the top-level. The new top-level modules print a warning statement
and simple import the moved modules for now. In the long run, we can
use these for further compatibility related things.