ADD key_account variable for stripe or other gateway

htdocs/install/mysql/tables/llx_societe_account.sql

@@ -27,6 +27,7 @@ CREATE TABLE llx_societe_account(
 	site              varchar(128),				-- name of external web site
 	fk_website        integer,					-- id of local web site
 	note_private      text,
+        key_account       varchar(128),
     date_last_login   datetime,
     date_previous_login datetime,
 	date_creation datetime NOT NULL, 
@@ -36,4 +37,4 @@ CREATE TABLE llx_societe_account(
 	import_key varchar(14), 
 	status integer 
 	-- END MODULEBUILDER FIELDS
-) ENGINE=innodb;
+) ENGINE=innodb;