MyAAC 0.7.4

• fixed mysql fatal error on tibiacom template - top 5 box
• fixed displaying of level percent bar on tibian signature
• inform user about Twig cache failure on installation, instead of http 500 error
• when dir system/cache is not writable by the webserver, then show some nice notice to the user about it instead of http 500 error
• remember client version select and usage stats checkbox in session on install
• automatically update highscores_ids_hidden for users who installed myaac before (migration)