Hiatus point
Significant rewrite in progress.  Having basic indexer & dbHandler working.

Minimal functional test and some unit tests in place.  All currently passing.
Have not yet dealt with "top level" dirs at start up, as all that code is
commented out and needs to be revisited.

Pending improvements:
- Have the dbTask struct take a list of fsentry.E, rather than one at a time.
- Add GOMAXPROCS to nindexers + 1
- Use pointers to fsentry.E rather than values (?)