- no more appId in appData as appVersion implies an appId*

- screenshot class has been reworked to remove need of appId
- screenshot class has been improved to send e-mails so that email handling can be removed from other scripts

tables/appdb_tables.sql

@@ -154,7 +154,6 @@ create table appComments (
  */
 create table appData (
 	id		int not null auto_increment,
-	appId		int not null,
 	versionId	int default 0,
 	type		enum('image', 'url', 'bug'),
 	description	text,
@@ -170,7 +169,6 @@ create table appData (
  */
 create table appDataQueue (
  queueId   int not null auto_increment,
- appId    int not null,
  versionId  int default 0,
  type   enum('image', 'url'),
  description  text,