chore(doc-gen): generate docs for angular.io

You can generate docs for comsumption by the angular.io website by running:

```bash
gulp docs/angular.io
```

The generated docs can be found in `dist/angular.io`

docs/angular.io-package/index.js

@@ -0,0 +1,48 @@
+var path = require('canonical-path');
+var Package = require('dgeni').Package;
+var basePackage = require('../public-docs-package');
+
+var PARTIAL_PATH = 'partials';
+var MODULES_DOCS_PATH = PARTIAL_PATH + '/api';
+
+module.exports = new Package('angular.io', [basePackage])
+
+.factory(require('./services/renderMarkdown'))
+.processor(require('./processors/addJadeDataDocsProcessor'))
+
+// Configure rendering
+.config(function(templateFinder, templateEngine) {
+
+  templateFinder.templateFolders
+      .unshift(path.resolve(__dirname, 'templates'));
+})
+
+.config(function(writeFilesProcessor) {
+  writeFilesProcessor.outputFolder  = 'dist/angular.io';
+})
+
+
+.config(function(computeIdsProcessor, computePathsProcessor, EXPORT_DOC_TYPES) {
+
+  computePathsProcessor.pathTemplates.push({
+    docTypes: ['module'],
+    pathTemplate: '${id}.html',
+    outputPathTemplate: MODULES_DOCS_PATH + '/${id}/index.jade'
+  });
+
+  computePathsProcessor.pathTemplates.push({
+    docTypes: EXPORT_DOC_TYPES,
+    pathTemplate: '${moduleDoc.id}/${name}-${docType}.html',
+    outputPathTemplate: MODULES_DOCS_PATH + '/${moduleDoc.id}/${name}-${docType}.jade',
+  });
+
+  computePathsProcessor.pathTemplates.push({
+    docTypes: ['jade-data'],
+    pathTemplate: '${originalDoc.id}/_data',
+    outputPathTemplate: MODULES_DOCS_PATH + '/${path}.json'
+  });
+})
+
+.config(function(getLinkInfo) {
+  getLinkInfo.relativeLinks = true;
+});