[DISCUSS] move classes into internal package?

[Jim Donofrio]

I would like to move some of the classes that users dont need to know 
about into the internal package so that they will see no javadoc on them 
and be encouraged not to use them. What are the thoughts on moving the 
following:

Serialization to internal.util
mock package to internal.mapred.mock
mapreduce.mock package to internal.mapreduce.mock
CounterWrapper to internal.counters
I understand that moving classes around is usually bad but no users 
should have called these classes directly anyway.