Add option to require master to wait for a specified number of workers to
connect before starting to dispatch tasks.
Add timing information for result retrieval since the results are now retrieved
much earlier than the outputs.
Add API to set and get the master bandwidth when transferring files to and from workers.
Report the total capacity of a local resource as its smallest and largest
values.
Fix typo.
Undocument the experimental feature that forces master to wait for specified
number of workers before beginning to dispatch tasks. (This feature was used in
the paper on application level techniques submitted to the TCC journal).