update readme, gitignore

Author: zachspar

.gitignore

@@ -1,3 +1,6 @@
+# envrc
+.envrc
+
 # JetBrains
 .idea/
 

README.md

@@ -1,5 +1,5 @@
-# fred_py_api
-FRED API Python Wrapper
+# Fred Python API
+A fully-featured FRED Python Wrapper.
 
-### FRED Reference
- - [Fred API Documentation](https://fred.stlouisfed.org/docs/api/fred/)
+### FRED References:
+ - [API Documentation](https://fred.stlouisfed.org/docs/api/fred/)

src/fredapi/api/fred_client.py

@@ -3,6 +3,7 @@
 Fred API Client.
 """
 from http import HTTPStatus
+from os import environ
 
 import requests
 
@@ -14,7 +15,10 @@ class FredClient(object):
 
     def __init__(self, api_key: str = None, base_client=None):
         """Init client."""
-        assert api_key or base_client, "Fred API Client or API Key required to use FredAPISeries"
+        if not base_client:
+            base_client = environ.get("FRED_API_KEY", None)
+
+        assert api_key or base_client, "Fred API Client or API Key required to use FredAPI"
 
         if base_client and isinstance(base_client, FredClient):
             self._api_key = base_client.get_api_key()