v0.3.8

• added short parameters -d for --file-db and -n for --no-file-db
• fixed bug for --use-netrc not working with submit command
• added Minimum required parameters section to default conf file so that users only need to edit small number of parameters in that section. for TL;DR users.
• cromwell.jar will be downloaded on ~/.caper/cromwell_jar/ instead of a directory specified with --tmp-dir