create lists of vertices and edges from Wikipedia page.sql and redirects.sql

wikigraph.sql

## verex list
SELECT p.page_id, p.page_title
FROM page p
WHERE p.page_namespace=0
INTO OUTFILE '/tmp/vertices.tsv'
FIELDS TERMINATED BY '  ';

## edge list
SELECT l.pl_from, p.page_id
FROM page p, pagelinks l
WHERE l.pl_title=p.page_title AND l.pl_namespace=0 AND p.page_namespace=0
INTO OUTFILE '/tmp/edges.tsv'
FIELDS TERMINATED BY '  ';