User can provide an initializer in ParamAttr. The initializer will be called when at parameters.create().

new parameterupdater use paddle pserver cclient of go

implement master server client, remove unnecessary dummy variable

Modify pserver client C API, create better test.

Add convert function

Row convolution operation.

add ostream header

fix bugs of parsing network topology in text generation task.

Make swig link RDMA libs if RDMA enabled

Minimize header file inclusion in StringPiece

Add StringPiece