Add accessors for tags on profile items.
Correct "use" to use the module we're really using.
New command to assign tags to configuration items.
New command to remove tags from configuration items.
Use cmp_bag instead of worrying about sorting in tests.
Make it possible to disable summarization.

The documentation claims a negative value could be used to disable
summarization. This makes it true.
Make --summary-threshold 0 always summarize.
InstData Import: update bam tests for header update from seqgrind sanitize
Somatic Validation profiles now have bam_readcount_version. Backfilled to 0.4.
Merge pull request #16 from gsanders/master

Somatic Validation profiles now have bam_readcount_version.
update default clin-seq pp
update clin-seq blessed

Clinseq pp was backfilled to use ver 0.4 of bam-rc, bless the results
coming from ver0.4 instead of the ver0.6 results which are in the
blessed build right now.
update tests to reflect new pp
Merge pull request #9 from tmooney/profile_item_tagging

Link items to tags and create commands for manipulating the tags set on the items.
Merge pull request #12 from tmooney/fix_summary_threshold

Make it possible to disable summarization.
InstData Import: update sanitize bam test data; use file::spec to cat file names