Finished Flink part script for performance evaluation 

This PR implements the flink part test programs, including Word Count, Word Count without combine, Connected Components, KMeans for both low and high dimension, Page Rank and TPCH Query 3. The dataset used for Connected Components and Page Rank are currently naive random graphs. Hypercube is used as KMeans dataset. The visualisation looks like this:

![figure_1](https://cloud.githubusercontent.com/assets/5807102/4029902/5ee83020-2c56-11e4-9ad7-ec4ea4646ea8.png)