Develop

A few more mturk-related changes.

The only possibly controversial one is the resubmission of a change to the boto main connection.py routine. I had modified build_list_params to support both an array of parameter names, or a string containing a set of whitespace- or comma-delimited parameter names. Formerly, only a single parameter name could be accepted as a string.

This change was submitted with a pull request on 11/27/2012, but was inadvertently removed, I believe, on 12/5 as part of fixing a regression with ec2. I believe the change to be fully backward-compatible, but if you feel otherwise, let me know and I'll create a new function that supports the enhancement.

Also, I see I inadvertently made 2 commits while logged in as root. Not being a git pro, I'm not sure how to change this. But if you need me to, I'll look into it. Sorry about that.

Thanks,
            Dennis McRitchie