Updated the documentation

Author: djthorpe

README.md

@@ -7,6 +7,7 @@ This repository contains a generic HTTP client which can be adapted to provide:
 * Ability to send files  and data of type `multipart/form-data`
 * Ability to send data of type `application/x-www-form-urlencoded`
 * Debugging capabilities to see the request and response data
+* Streaming JSON responses
 
 Documentation: https://pkg.go.dev/github.com/mutablelogic/go-client/pkg/client
 
@@ -70,9 +71,8 @@ Various options can be passed to the client `New` method to control its behaviou
 The first argument to the `Do` method is the payload to send to the server, when set. You can create a payload
 using the following methods:
 
-* `client.NewRequest(accept string)` returns a new empty payload which defaults to GET. The accept parameter is the
-  accepted mime-type of the response.
-* `client.NewJSONRequest(payload any, accept string)` returns a new request with a JSON payload which defaults to GET.
+* `client.NewRequest()` returns a new empty payload which defaults to GET.
+* `client.NewJSONRequest(payload any, accept string)` returns a new request with a JSON payload which defaults to POST.
 * `client.NewMultipartRequest(payload any, accept string)` returns a new request with a Multipart Form data payload which 
   defaults to POST.
 * `client.NewFormRequest(payload any, accept string)` returns a new request with a Form data payload which defaults to POST.
@@ -98,7 +98,7 @@ func main() {
         Reply string `json:"reply"`
     }
     request.Prompt = "Hello, world!"
-    payload := client.NewJSONRequest(request, "application/json")
+    payload := client.NewJSONRequest(request)
     if err := c.Do(payload, &response, OptPath("test")); err != nil {
         // Handle error
     }
@@ -146,7 +146,9 @@ Various options can be passed to modify each individual request when using the `
 * `OptToken(value Token)` adds an authorization header (overrides the client OptReqToken option)
 * `OptQuery(value url.Values)` sets the query parameters to a request
 * `OptHeader(key, value string)` appends a custom header to the request
-
+* `OptResponse(func() error)` allows you to set a callback function to process a streaming response.
+  See below for more details.
+* `OptNoTimeout()` disables the timeout on the request, which is useful for long running requests
 
 ## Authentication
 
@@ -183,3 +185,9 @@ You can create a payload with form data:
 * `client.NewMultipartRequest(payload any, accept string)` returns a new request with a Multipart Form data payload which defaults to POST. This is useful for file uploads.
 
 The payload should be a `struct` where the fields are converted to form tuples. File uploads require a field of type `multipart.File`.
+
+## Streaming Responses
+
+If the returned content is a stream of JSON responses, then you can use the `OptResponse(fn func() error)` option, which
+will be called by the `Do` method for each response. The function should return an error if the stream should be terminated.
+Usually, you would pair this option with `OptNoTimeout` to prevent the request from timing out.