Alink version 1.0.1

[fix] Remove the dependency of net.sf.json-lib:json-lib.

see #7 

[fix] Remove useless operators
[add] PyAlink: Support OneVsRest
[fix] PyAlink: Fix classpath issue in Windows usage.
[update] Update the document to release 1.0.1

Alink version 1.0

Alink is the Machine Learning algorithm platform based on Flink, developed by the PAI team of Alibaba computing platform.