Adapt to new design of parallelism

Hide varray parameters from distnet/layer.py

Finish new design, move to devsever to test out

Fix bugs with new design and add some file, data provider still buggy

Keep fixing bugs, move to geeker for test

Update readme file, fix bugs in batch-leading parallelism, working on cudaconv3

Fix cudaconv3 bugs in pooling operations with multiGPUs