sporadic state via files.
This allows, for example, sporadic VM apps.
The logic for reading and writing of files is in the API library,
rather than in the wrappers.

Also: wrappers show message and exit if bad command line option.

Also: small code shuffle in vboxwrapper to parse cmdline before doing anything.

API: debug sporadic stuff.
    Remove 2-second exit delay in standalone mode.

client:
    if <heartbeat_debug>, show the heartbeat message
    don't create slot dir for --app_test job (it uses slots/app_test)
    don't show sporadic resoures used if there are none

sporadic:
    add --wrapped option: don't use BOINC api; communicate via files

wrapper:
    don't print start msg twice