Add hs.plist.readString()

[latenitefilms]

Currently hs.plist.read(path) only allows you to read property lists from external files. It could be handy if you could also read a property list from a string.

Maybe related:
https://developer.apple.com/documentation/foundation/nsstring/1413115-propertylist?language=objc

Maybe useful:

NSData* plistData = [source dataUsingEncoding:NSUTF8StringEncoding];
NSString *error;
NSPropertyListFormat format;
NSDictionary* plist = [NSPropertyListSerialization propertyListWithData:plistData mutabilityOption:NSPropertyListImmutable format:&format errorDescription:&error];
NSLog( @"plist is %@", plist );
if(!plist){
    NSLog(@"Error: %@",error);
    [error release];
}