JobKill looks good, needs testing

MySQLSetup.py:
-added status 'K' for jobs that were killed and should not be run unless
resurrected
Questions.py:
-updated KillCurrentJobQuestion to take another parameter called
statusAfterDeath, which represents the status a task will be given in
the database after the render node stops running it.
-removed unnecessary imports
RenderNodeMain.py:
-reduced the Servers import
-created a new attribute for RenderTCPServer which stores the status
code received from a KillCurrentJobQuestion.
Servers.py:
-moved the import for Questions to the bottom of the file to avoid a
problem with circular importing
getOff.py:
-updated the line that sends the KillCurrentJobQuestion so it sends the
correct status code along with it
submitCommand.py:
-changed it so it will only run the code when its being run as a main
program
Connections.py:
-removed the "__doc__ =" from the docstring because it's redundant and
was throwing a warning in my IDE