this is v0.15.4

-fixed high cpu load by using another progressindicator (the old got a bug)
-maximum threads increased to 25 (may cause errors from server)
-added button to add a new show
-clicking enter at show searching adds the first show in the list
-added ability to disable updater
-updater now checks every 30 minutes (because on a server it's always running,
 so checking only at programstart makes no sense)
-background images can now be disabled

-some code cleanup