Close #1 Improve configuration for python projects

README.md

@@ -23,12 +23,8 @@ res = pgrest_client.get("kerbals", params=payload)
 ##### Other projects
 
 ```python
-from postgrestutils import settings
-
-settings.BASE_URI = "http://localhost:3000"
-settings.JWT = ""
-
 from postgrestutils.client import pgrest_client
+pgrest_client.configure('your-JWT', base_uri='http://127.0.0.1:3000')
 
 payload = {
     "select": "id,forename"

postgrestutils/client/postgrestclient.py

@@ -6,16 +6,23 @@ from postgrestutils.client.utils import datetime_parser
 
 
 class PostgrestClient:
-    def __init__(self, base_uri, token):
-        self.base_uri = base_uri
+    def __init__(self, base_uri, token=None):
         self.session = requests.Session()
-        self.session.headers["Authorization"] = "Bearer {}".format(token)
+        self.configure(token, base_uri=base_uri)
+        self.session.headers['Accept'] = 'application/json'
+
+    def configure(self, token, base_uri=None):
+        if base_uri is not None:
+            self.base_uri = base_uri
+        if token:
+            self.session.headers['Authorization'] = 'Bearer {}'.format(token)
 
     def get(self, path, singular=False, parse_dt=True, **kwargs):
         """
         :param path: specifies the endpoint
         :param singular: if True returns a JSON object rather than a list (406 when multiple results are returned)
         :param parse_dt: if True attempts to parse datetime strings to python datetime objects
+        :param kwargs: pass kwargs directly to requests's .get() method
         :return: result(s) as python object or raises HTTPError
         """
         if singular: