begin working on sequence handler

ref #3

config.json

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+{
+    "development": {
+        "port": 8888
+    }
+}

handlers/sequence.py

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+class SequenceHandler(RequestHandler):
+    def post(self, dir_name_array):
+        # response
+        try:
+            # get the image paths
+            # cut them into sequences
+            # move them to path /sequence/<sequence_id>/
+            # do the sequence generating
+            self.set_status(200)
+
+        except:
+            self.write_error()
+
+        finally:
+            self.finish()   

index.py

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+import tornado.ioloop
+import tornado.web
+import json
+from os import environ
+# config
+with open('config.json', 'w') as f: 
+    config = json.load(f)
+
+devPort = config[environ['ENV'] if 'ENV' in environ.keys() else 'development']
+
+if __name__ == "__main__":
+    app = tornado.web.Application([
+        url(r'/sequence', sequenceHandler)
+    ])
+    app.listen(devPort)
+    app.ioloop.IOLoop.current().start()