Fix middleclass link, I think

[rbdr/custom_event_support.lua] / README.md

# custom_event_support.lua #

This is a lua port of CustomEventSupport.js by @azendal. It's a
simple implementation of the observer pattern.

## Dependencies ##

* Middleclass (kikito/middleclass)

## Usage ##

Step 1. Require it somewhere

```lua
CustomEvent = require('custom_event')
CustomEventSupport = require('custom_event_support')
```

Step 2. Include it in a class

```
local MyClass = class('MyClass')
MyClass:include(CustomEventSupport)
```

Step 3a. Bind events

```lua
-- Bind them to the class
MyClass:bind('click', function (self, ev)
  print("Hey, I caught the event")
end)


-- or bind them to an instance
local my_instance = MyClass:new()
my_instance:bind('click', function (self, ev)
  print("Hey, I caught another event: "..tostring(ev.message))
end)
```

Step 3b. Dispatch events

```lua
-- Dispatch them from the class. You can optionally pass data as a
table.
MyClass:dispatch('click')

-- or dispatch them from an instance
my_instance:dispatch('click', {message = "Instance event!"})
```

That's it. Enjoy :)