Changelog

Core changes (Adnan):

-Renamed classes TCPClient to CClient and Client to HClient
-Album art is being loaded if available
-Album art is being streamed to the client
-Cache folder reserved on the sd card, path: "sdcard/musicHUB/"
-Added connection timeout and automatic reconnecting
-Server is spawning only read/write threads per client (removed the manager thread)

UI & other changes (Dino):
-Replaced album art placeholders with default album arts, which will then be replaced by actual album arts
-Fixed double music playing on screen rotation
-Fixed UI corruptions on screen rotation
-Fixed item doubling in playlist under certain circumstances
-Client is more responsive