Fixed issue #14:

- Checks that the status code is 1. If it's not then the program exits and returns the message field to the
user.

Incidentals:

- I was using `json.loads()` to turn the respone text into json. However, the request object has a method which
returns the json from the response. Thus, I have switched to using the `.json()` method.

Author: taylorjdawson

etherscan/client.py

@@ -1,5 +1,4 @@
 import requests
-import json
 import collections
 
 #  Assume user puts his API key in the api_key.json file under variable name "key"
@@ -88,7 +87,11 @@ def connect(self):
         if req.status_code == 200:
             # Check for empty response
             if req.text:
-                return json.loads(req.text)
+                if req.json()['status'] == '1':
+                    return req.json()
+                else:
+                    print(req.json()['message'])
+                    exit()
             else:
                 print("Invalid Request")
                 exit()