Add YEAR in to names.merge key and join

make sure the NEWEST names are used for schools that change names, as
happened in Washington.
Change search for coeff matrices to deal with non-existent BASELINE or COHORT matrices

For heterogeneous content area projections (EOCT).  Example in Georgia
where there are BASELINE mathematics matrices, but not for Coordinate
Algebra.  Here we set it up to use the 2013 (current year) cohort ref’d
matrices as an analog to baseline.