Add sample text search dictionary templates and parsers, to replace the

hard-to-maintain textual examples currently in the SGML docs.  From
Sergey Karpov.

contrib/test_parser/sql/test_parser.sql

@@ -0,0 +1,26 @@
+--
+-- first, define the parser.  Turn off echoing so that expected file
+-- does not depend on contents of this file.
+--
+SET client_min_messages = warning;
+\set ECHO none
+\i test_parser.sql
+\set ECHO all
+RESET client_min_messages;
+
+-- make test configuration using parser
+
+CREATE TEXT SEARCH CONFIGURATION testcfg (PARSER = testparser);
+
+ALTER TEXT SEARCH CONFIGURATION testcfg ADD MAPPING FOR word WITH simple;
+
+-- ts_parse
+
+SELECT * FROM ts_parse('testparser', 'That''s simple parser can''t parse urls like http://some.url/here/');
+
+SELECT to_tsvector('testcfg','That''s my first own parser');
+
+SELECT to_tsquery('testcfg', 'star');
+
+SELECT ts_headline('testcfg','Supernovae stars are the brightest phenomena in galaxies', 
+       to_tsquery('testcfg', 'stars'));