Changes

Currently, I am thinking about using one-hot vector to encode the structure of a DSL page. The author of the [http://www.edegan.com/wiki/Pix2code pix2code] project also had the same approach. However, the preprocessing part was not discussed carefully in the paper and the source code was not commentedproperly. This [https://blog.floydhub.com/turning-design-mockups-into-code-with-deep-learning/ article] gives a more detailed instruction for the embedding method. For our project, we can ignore the image-preprocessing part and focus solely on the text processing.