Started adding documentation for NYT source

Author: ibhuiyan17

README.md

@@ -36,6 +36,8 @@ Currently 2 different data-sources are available to retrieve the data:
 
 * **csbs** - https://www.csbs.org/information-covid-19-coronavirus - U.S. County data that comes from the Conference of State Bank Supervisors.
 
+* **nyt** - https://github.com/nytimes/covid-19-data - The New York Times is releasing a series of data files with cumulative counts of coronavirus cases in the United States, at the state and county level, over time. 
+
 __jhu__ data-source will be used as a default source if you don't specify a *source parameter* in your request.
 
 ## API Reference
@@ -71,7 +73,8 @@ __Sample response__
 {
     "sources": [
         "jhu",
-        "csbs"
+        "csbs",
+        "nyt"
     ]
 }
 ```
@@ -87,7 +90,7 @@ GET /v2/latest
 __Query String Parameters__
 | __Query string parameter__ | __Description__                                                                  | __Type__ |
 | -------------------------- | -------------------------------------------------------------------------------- | -------- |
-| source                     | The data-source where data will be retrieved from *(jhu/csbs)*. Default is *jhu* | String   |
+| source                     | The data-source where data will be retrieved from *(jhu/csbs/nyt)*. Default is *jhu* | String   |
 
 __Sample response__
 ```json
@@ -117,7 +120,7 @@ __Path Parameters__
 __Query String Parameters__
 | __Query string parameter__ | __Description__                                                                  | __Type__ |
 | -------------------------- | -------------------------------------------------------------------------------- | -------- |
-| source                     | The data-source where data will be retrieved from *(jhu/csbs)*. Default is *jhu* | String   |
+| source                     | The data-source where data will be retrieved from *(jhu/csbs/nyt)*. Default is *jhu* | String   |
 
 #### Example Request
 ```http
@@ -160,7 +163,7 @@ GET /v2/locations
 __Query String Parameters__
 | __Query string parameter__ | __Description__                                                                                                                                  | __Type__ |
 | -------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------ | -------- |
-| source                     | The data-source where data will be retrieved from.<br>__Value__ can be: *jhu/csbs*. __Default__ is *jhu*                                         | String   |
+| source                     | The data-source where data will be retrieved from.<br>__Value__ can be: *jhu/csbs/nyt*. __Default__ is *jhu*                                         | String   |
 | country_code               | The ISO ([alpha-2 country_code](https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2)) to the Country/Province for which you're calling the Endpoint | String   |
 | timelines                  | To set the visibility of timelines (*daily tracking*).<br>__Value__ can be: *0/1*. __Default__ is *0* (timelines are not visible)                | Integer  |