Remove clear_output timeout callback in favor of fixed height
Removed ability to clear stdout and stderr individually.
Added wait flag to clear_output.
Initial changes to make alias system use magics
Allow new style aliases to be stored
Remove alias code from prefilter
Alias code cleanup
AliasCaller knows its own name
Remove unnecessary prefilter alias handler tests
Remove alias_table
Add test for alias creation, use and destruction
Fix storemagic test for new alias API
Add What's new entry for changes to alias system
Remove alias machinery from IPCompleter
Don't preserve height when clear_output(wait=False) is called
Changes to Alias API after discussion with Fernando
make timeit optionally return an object

-o now allow to return an object that contains raw result of timeit magic
for later use.

-q make the timeit magic not print anything (quiet)
Updated clear_output animation example nb
Added wait=True to a couple more clear_output calls.
Added clear_output changes