added -X to pecan parameters. Crashes on some sequences for no good reason without -X.
added -X to pecan parameters. Crashes on some sequences for no good reason without -X.

james-monkeyshines/ensembl-analysis,james-monkeyshines/ensembl-analysis,mn1/ensembl-analysis,kiwiroy/ensembl-analysis,mn1/ensembl-analysis,Ensembl/ensembl-analysis,mn1/ensembl-analysis,Ensembl/ensembl-analysis,Ensembl/ensembl-analysis,kiwiroy/ensembl-analysis,james-monkeyshines/ensembl-analysis