Remove unused files
Fix another bashism
Update qgen for postgresql explain
Update pgsql template with date casts
Combine index creation with table load

Reduce load time by creating indexes on a table immediately after the
table is loaded.  Previously waited until all tables loaded data before
building any indexes.
Re-add makefile

Accidentally removed previously.
Remove automatic output directory naming

Require the user to specify the output directory.  This is intended to
give the testers the ability to make meaningful results directory names.
Fix labeling on query time barplot