Compile proto files to protos directory
Remove old protos (taken from snakebite)
For now ignore generated protos
Add new (hadoop 2.2.0) common/hdfs protos
Compile new protos - devided by protocol types

Compile common, hdfs, namenode and datanodes protocols.
Generate services for python

Protos have options to generate rpc services for java, we need the same
thing for python, add:
option py_generic_services = true
to protos defining service.