Merge branch 'dev' into virusdefender-dev

* dev:
  修改后端problem中的的命名规范
  前端创建题目界面增加输入描述和输出描述
  后端增加输入描述与输出描述两个字段，并修改其相关的后端内容

problem/views.py

@@ -69,6 +69,8 @@ class ProblemAdminAPIView(APIView):
             data = serializer.data
             problem = Problem.objects.create(title=data["title"],
                                              description=data["description"],
+                                             input_description=data["input_description"],
+                                             output_description=data["output_description"],
                                              test_case_id=data["test_case_id"],
                                              source=data["source"],
                                              samples=json.dumps(data["samples"]),
@@ -105,6 +107,8 @@ class ProblemAdminAPIView(APIView):
 
             problem.title = data["title"]
             problem.description = data["description"]
+            problem.input_description = data["input_description"]
+            problem.output_description = data["output_description"]
             problem.test_case_id = data["test_case_id"]
             problem.source = data["source"]
             problem.time_limit = data["time_limit"]