trackToBaseMask [options] database track [o.bama]

Create baseMask from track in database.
Reads track from database and creates genomeRangeTree.
Prints sum of sizes of all non-overlapping ranges and 
total size of all chromosomes for database to stderr.
Optionally write tree to output file o.bama, if specified.

Options:
  -chromDb=db : Specify alternate database to find chromInfo table
                (table might be in a different database)
  -quiet      : do not print sizes to stderr.
  -verbose=n  : verbose > 1 prints some details.