How to make sense of confusion matrix
Adding to the answer above, 


The labeling totally depends on how you define it. You can define 0 as negative or as positive. However, for the sake of understanding and ease of readability, keep it meaningful.
The instances that are correctly predicted are given by the diagonal.
Here, '1' is True Negative or for the class labelled as 0 and '5' is True Positive or for the class labelled as 1. 


If you find it difficult to interpret by a simple confusion matrix, you could plot it. 
Check out plotConfusion by MathWorks.