trial shouldn't drop _trial_temp in the directory in which it's run.

New submission from ChrisW <None>:

...it should use: 

http://docs.python.org/library/tempfile.html#tempfile.mkdtemp

...it's what it's there for.

Even if it doesn't want to use that for some stange reason, it should clear up after itself and not leave the directory lying around.

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Type     : defect
Component: trial
Keywords : 
Priority : normal
Nosy     : 
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http://twistedmatrix.com/trac/ticket/4214