Changed Dry_Run value so that dry runs are no longer the default setting.
Changed badblocks call to exit immediately on first error.
Set logging directoryto current working directory using pwd command.
Reduced default tests so that we run:
1> Short SMART test
2> badblocks
3> Extended SMART test
Modified parsing of short and extended test durations to accommodate the values returned by larger drives; we needed to strip out the '(' and ')' characters surrounding the integer value in order to fetch it reliably.