Add disclaimer to the beginning of each caption

Each caption now explains that the figure and commentary is automatically
generated and then has a 'teaser' that there's 'more to come...'
Fix gdp recipe in makefile

The previous version didn't actually record that the new gdp plot was
posted.  This one does.
Fix several end-date bugs in single plot funtions

There were serveral bugs in the handling of end dates.  At least one of them
was causing the plots to be misconstructed.