Updated Inherited Deletions vignette.

Now we have a new figure that shows the 95 percent CIs for the three most significant regions.  One of these regions is undertransmitted and the association signal arises due only to excessive under-transmission in the controls.

Also cleaned up some previous figures.
Updated Inherited Deletions vignette.

Created and populated a table for the three regions of interest; chr7, 8, and 15.
Updated .gitignore.

Now git ignores files tables.asciidoc.* which are used to create the tables that appear in the inherited deletions vignette.