Protocol buffer class added

proto/Request.proto

+package DataImporter_ns;
+
+message Request
+{
+	//Request type descriptor
+
+	enum Type
+	{
+		AUTHORIZATION = 0;
+		DATA = 1;
+	}
+
+	required Type type = 1;
+
+	//Authorization request
+
+	message Authorization
+	{
+		required string username = 1;
+		required string password = 2;
+	}
+
+	optional Authorization authorization = 2;
+
+	//Data request
+	
+	message Data
+	{
+		required string file_path = 1;
+		required int32 file_version = 2;
+		required string file_name = 3;
+	}
+}

proto/Response.proto

+package DataImporter_ns;
+
+message Response
+{
+	//Response type descriptor
+
+	enum Type
+	{
+		AUTHORIZATION = 0;
+		DATA = 1;
+	}
+
+	required Type type = 1;
+
+	//Authorization response
+
+	message Authorization
+	{
+		enum State
+		{
+			ACCEPTED = 0;
+			REJECTED = 1;
+		}
+		
+		required State state = 1;
+		required string status = 2;
+	}
+
+	optional Authorization authorization = 2;
+
+	//Data response
+
+	message Data
+	{
+		enum State
+		{
+			ACCEPTED = 0;
+			REJECTED = 1;
+		}
+		
+		required State state = 1;
+		required string status = 2;
+
+		required uint64 size = 3;
+	}
+}