Improve static data compositing algorithm to not take forever
Tweak optimized algorithm to allow deriving column names from data column indexes, and fix references to algorthim in pgsql8 diffing
Update references to data rows pk searching in mysql5/mssql10, trash some comments
Merge branch 'dev-optimize-data-overlay'

This optimizes the algorithm used to overaly static data rows based on
primary key. What used to take minutes now takes seconds.