Fixed some serious buggage

JobKill.py:
-corrected the use of the return value of connection.getAnswer

JobListTest.py:
-put teeth on the Kill Job button
-disabled the Kill Task button since it doesn't do anything at the
moment

JobTicket.py:
-fixed a completely debilitating bug where inserts were being done
without transactions
-added a "kwargs" argument list to JobTicket.submit because I needed a
way to pass along info about the project path to MayaTicket. I chose to
make an argument list rather than just making a single keyword because I
wanted to keep JobTicket as generic as possible.

LoggingSetup.py:
-import "Constants" was missing. added it.

RenderNodeMain.py:
-formatting changes

SubmitterMain.py:
-added a QLineEdit to display the current project path.
clicking/selecting text in the line edit pops open a file browser which
filters out everything except  workspace.mel.

MessageBoxes.py:
-created this file as a convenience for popping open Qt message boxes