2013-08-07 Nabil-Fareed Alikhan <n.alikhan@uq.edu.au>
  - BLAST results now get cached in temp-dir scratch, so save rerunning Blast
  Everytime. Cache needs to be cleared manually, Will not check if Blast
  results are corrupt (e.g. filesize == 0, only that they are absent. )
  -  Added svg option for results image. Use --svg flag