1. Changing extension of files with binary data to .bin.
2. Running separate benchmark for each query according to numElements in their
result.

1. Exporting query and result byte slices inside SubGraph so that they are
written to file when we write the SubGraph to file after gobencoding it.
2. Added benchmark test to benchmark ToJSON and ToProtocolBuffer methods for
actors and directors query for 10,100 and 1000 entities in the result.

preTraverse()

Removed the unnecessary extract function and result struct. Now preTraverse
directly acceses flatbuffers to get values and uidmatrix.
Renamed struct fields in the protocol buffer schema file.

1. Removed client.go and client_test.go
2. Modified protocol buffer structure to have Values as a struct which
contains byte slice.
3. Added support to calculate latency because of protocol buffer.

1. Protocol buffer now stores a entity based subgraph instead of a predicate
based subgraph.

Query would be needed to parse the Graph Response on the client side, hence
sending it in the protocol buffer response.

1. Renamed GetResponse to Query in DGraph service.
2. Client now accepts the ip of the server as a flag instead of just the port.
3. Removed ToProtocolBuffer method, and added PreTraverse as a method for a Subgraph.
4. Renamed runServerForClient to runGrpcServer.

Client now gets back protocol buffer data and is able to parse it into protocol buffer Subgraph

1. Added subgraph.proto file which has the message structure.
2. Added ToProtocolBuffer method which converts a subgraph to protocol buffer.