Add doc generator.

tools/doc/README.md

@@ -0,0 +1,76 @@
+Here's how the node docs work.
+
+Each type of heading has a description block.
+
+
+    ## module
+
+        Stability: 3 - Stable
+
+    description and examples.
+
+    ### module.property
+
+    * Type
+
+    description of the property.
+
+    ### module.someFunction(x, y, [z=100])
+
+    * `x` {String} the description of the string
+    * `y` {Boolean} Should I stay or should I go?
+    * `z` {Number} How many zebras to bring.
+
+    A description of the function.
+
+    ### Event: 'blerg'
+
+    * Argument: SomeClass object.
+
+    Modules don't usually raise events on themselves.  `cluster` is the
+    only exception.
+
+    ## Class: SomeClass
+
+    description of the class.
+
+    ### Class Method: SomeClass.classMethod(anArg)
+
+    * `anArg` {Object}  Just an argument
+      * `field` {String} anArg can have this field.
+      * `field2` {Boolean}  Another field.  Default: `false`.
+    * Return: {Boolean} `true` if it worked.
+
+    Description of the method for humans.
+
+    ### someClass.nextSibling()
+
+    * Return: {SomeClass object | null}  The next someClass in line.
+
+    ### someClass.someProperty
+
+    * String
+
+    The indication of what someProperty is.
+
+    ### Event: 'grelb'
+
+    * `isBlerg` {Boolean}
+
+    This event is emitted on instances of SomeClass, not on the module itself.
+
+
+* Modules have (description, Properties, Functions, Classes, Examples)
+* Properties have (type, description)
+* Functions have (list of arguments, description)
+* Classes have (description, Properties, Methods, Events)
+* Events have (list of arguments, description)
+* Methods have (list of arguments, description)
+* Properties have (type, description)
+
+# CLI usage
+
+Run the following from the etherpad-lite root directory:
+```sh
+$ node tools/doc/generate doc/all.md --format=html --template=doc/template.html > out.htm
+```