Created new host discovery system

- now store host uuid and mac address
- use uuid to check for duplicate hosts
- try local and external IPs
- pair status is shown
- server status is shown
- validate host when manually adding

Limelight/Utility/Utils.m

@@ -13,6 +13,7 @@
 #include <netdb.h>
 
 @implementation Utils
+NSString *const deviceName = @"roth";
 
 + (NSData*) randomBytes:(NSInteger)length {
     char* bytes = malloc(length);