Fixes to recent extension changes. (#568)

* Fixes to recent extension changes.

* Fixes issue where gin will continue calling the handler even if next() isn't called.

* Updated docs.

docs/README.md

@@ -5,7 +5,8 @@
 If you are a developer using Fn through the API, this section is for you.
 
 ### Getting Started
-* [Quickstart](https://github.com/fnproject/fn)
+
+* [Quickstart](https://github.com/fnproject/fn#quickstart)
 * [API Reference](http://petstore.swagger.io/?url=https://raw.githubusercontent.com/fnproject/fn/master/docs/swagger.yml)
 * [FAQ](faq.md)
 * [Object Model](developers/model.md)
@@ -17,17 +18,25 @@ If you are a developer using Fn through the API, this section is for you.
 * [Writing functions](writing.md)
 
 ### Advanced
+
 * [Open Function Format](function-format.md)
 * [Packaging functions](packaging.md)
 * [CLI Source](https://github.com/fnproject/cli/)
 * [Async functions](async.md)
 * [Organizing functions into an application](developers/apps.md)
 
+### Learn More
+
+* [Examples](../examples)
+* [Getting Started Series](../examples/tutorial)
+* [Tutorials](https://github.com/fnproject/tutorials)
+
 ## For Operators
 
 If you are operating Fn, this section is for you.
 
 ### Getting Started
+
 * [Running in Production](operating/production.md)
 * [Logging](operating/logging.md)
 * [Message Queues](operating/mqs/README.md)
@@ -37,18 +46,15 @@ If you are operating Fn, this section is for you.
 * [User Interface](operating/ui.md)
 
 ### Advanced
+
 * [Extending Fn](operating/extending.md)
 * [Running Fn on Kubernetes](operating/kubernetes/README.md)
 * [Setting up development environment with Docker compose](./operating/compose.md)
 * [OpenStack Triggers](operating/triggers.md)
 * [Docker Configuration](operating/docker.md)
 
+## For Contributors
 
+If you are working on the Fn Project, want to work on it or are creating extensions, this section is for you.
 
-## Learn More
-
-* [Examples](../examples)
-* [Getting Started Series](../examples/tutorial)
-* [Tutorials](https://github.com/fnproject/tutorials)
-
-
+* [Writing Extensions](contributors/extensions.md)

docs/contributors/README.md

@@ -1,3 +0,0 @@
-# Docs for Contributors
-
-* [Writing Extensions](extending.md)

docs/contributors/extensions.md

@@ -20,17 +20,19 @@ to be called during setup:
 ```go
 func init() {
     server.RegisterExtension(&fnext.Extension{
-        Name:  "logspam",
+        Name:  "github.com/treeder/fn-ext-example/logspam", // Should be the import name
         Setup: setup, // Fn will call this during startup
     })
 }
 
 func setup(s *fnext.ExtServer) error {
-    // Add all the hooks you extension needs here
+    // Add all the hooks your extension needs here
     s.AddCallListener(&LogSpam{})
 }
 ```
 
+See https://github.com/treeder/fn-ext-example for full example.
+
 ## Listeners
 
 Listeners are the main way to extend Fn.