Update the IndexedRDD import version to 0.3.0

[jjyycchh]

In the IndexedRDD of version 0.1.0, there are some problems when running on Spark by streaming method. Some uncaught exceptions like Array Index out of bound will appear when insert new user or product into the old model. It could be fixed when I update the program to support IndexedRDD v0.3.0.

Beside, I wrote some test functions when I make demo of Local MF, so the model could be saved into disk. Those are just some experiment functions that can be ignored.