Technology definitions loader

* Added "dummy" data file for technologies (for now it simply copies the
old, line-based technologies) and corresponding XML schema

* Added missing SQL stored procedure to clear all dependencies and
reverse dependencies from a technology

* Added import classes, loader and import tool for the technology graph

* Added tech graph import tool to post-build tests

legacyworlds-server-data/db-structure/parts/040-functions/030-tech.sql

@@ -324,6 +324,47 @@ GRANT EXECUTE
 
 
 
+/*
+ * Remove all dependencies for a technology
+ * -----------------------------------------
+ * 
+ * This stored procedure removes all dependencies and reverse dependencies for
+ * some technology.
+ * 
+ * Parameters:
+ *		_technology		The name of the technology
+ */
+DROP FUNCTION IF EXISTS defs.techdep_clear( TEXT );
+CREATE FUNCTION defs.techdep_clear( _technology TEXT )
+	RETURNS VOID
+	LANGUAGE SQL
+	STRICT VOLATILE
+	SECURITY DEFINER
+AS $techdep_clear$
+
+	DELETE FROM defs.technology_dependencies
+		WHERE technology_name_id = (
+				SELECT id FROM defs.strings
+					WHERE name = $1
+			);
+
+	DELETE FROM defs.technology_dependencies
+		WHERE technology_name_id_depends = (
+				SELECT id FROM defs.strings
+					WHERE name = $1
+			);
+
+$techdep_clear$;
+
+REVOKE EXECUTE
+	ON FUNCTION defs.techdep_clear( TEXT )
+	FROM PUBLIC;
+GRANT EXECUTE
+	ON FUNCTION defs.techdep_clear( TEXT )
+	TO :dbuser;
+
+
+
 -- ********************************************************
 -- OLD CODE BELOW
 -- ********************************************************