Added SpecimenBatchPositions table.

The recent addition of the FeatureActions table (replacing the
FeatureActionResults table), allows us to solve an important need in
every laboratory.  See
http://uchic.github.io/ODM2/schemas/ODM2_Feb26_MeetingBranch/diagrams/OD
M2LabAnalyses.html
* Deleted the long Note, and rearranged the diagram a bit.
* I made a tiny change in ODM2DataQuality.ResultNormalizationValues.  I
made the ResultID a primary key in this table, following the
conventions that we have used for Specimens and Sites.