example configuration for LTR task.

[lcy-seso]

In this example, we would like to show how to do LTR task in PaddlePaddle. Usually, there are three ways:

1. pointwise (a simple regression/classification task, so we do not consider this situation in this example)
2. pairwise, please refer to this configuration file written in old PaddlePaddleAPI.
3. listwise, please refer to this configuration file written in old PaddlePaddleAPI.

The example also must include how to predict. Note that in LTR task, training and testing network is different.

I suggest to use movielens dataset.

Please pull your codes and docs into the ltr directory.

[dzhwinter]

TODO:
fix this project.