"Add dependencies" implemented

A few bugs in the SQL scripts have been fixed. It is now possible to add
new dependencies to a task from the details page.

database/create-tables.sql

@@ -22,6 +22,7 @@ GRANT SELECT,UPDATE ON notes_note_id_seq TO :webapp_user;
 CREATE SEQUENCE task_dependencies_taskdep_id_seq INCREMENT 1
 	MINVALUE 1 MAXVALUE 9223372036854775807
 	START 1 CACHE 1;
+GRANT SELECT,UPDATE ON task_dependencies_taskdep_id_seq TO :webapp_user;
 
 -- Tables
 

database/task-dependencies.sql

@@ -287,7 +287,7 @@ CREATE OR REPLACE FUNCTION tasks_add_dependency( t_id INT , t_dependency INT )
 		SECURITY INVOKER
 	AS $tasks_add_dependency$
 BEGIN
-	INSERT INTO task_dependencies( task_id , task_id_depends_on )
+	INSERT INTO task_dependencies( task_id , task_id_depends )
 		VALUES ( t_id , t_dependency );
 	RETURN 0;
 EXCEPTION