Crash on upload if trash folder doesn't exist

[Drew Burden]

I think this just keeps the app from placing the URL on the clipboard and notifying on successful upload, everything else is fine

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URL Shortened: http://is.gd/cqpDP
Traceback (most recent call last):
  File "/usr/bin/lookit", line 130, in capture_area
    self.process_pixbuf(pb)
  File "/usr/bin/lookit", line 147, in process_pixbuf
    self.upload_image(hashstring)
  File "/usr/bin/lookit", line 190, in upload_image
    os.path.join(TRASH_DIR, image))
OSError: [Errno 2] No such file or directory