CRB backrounds and plaguestone backgrounds

schema/backgrounds.sql

@@ -2,9 +2,11 @@
 
 CREATE TABLE backgrounds (
   bg_id INTEGER PRIMARY KEY,
-  bg_name TEXT NOT NULL UNIQUE,
-  bg_descr TEXT NOT NULL,
+  "name" TEXT NOT NULL UNIQUE,
+  descr TEXT NOT NULL,
   sources_id INTEGER NOT NULL,
   sources_pages TEXT NOT NULL,
+  is_comty_use BOOLEAN NOT NULL, -- false = no community use policy required
+  is_specific_to_adv BOOLEAN NOT NULL, -- means the background is specific to its adventure
   FOREIGN KEY (sources_id) REFERENCES sources(sources_id)
 );