Provide an #ifdef in shell.c to work around issues when cross-compiling
from Ubuntu to windows.
In the command-line shell add the (undocumented and unsupported) ".eqp"
command and -eqp command-line option, to cause EXPLAIN QUERY PLAN to be
run on each SQL statement as it is evaluated.  Intended use is for analysis
of the query planner.
Remove the vdbeRecordCompareLargeHeader function. Fix some other details.
Merge trunk changes.