Added `--unaln` option to apps.bwa.align() and bwasw() which will retain unaligned reads in separate sam/bam output file. Added a few more grid specific options to apps.grid.GridProcess(class); updated all functions making use of GridProcess. Using `bash` instead of `sh` as executable in subprocess.call() and Popen()
Merge branch 'master' of github.com:tanghaibao/jcvi