Fix #37: Add README for react-server-gulp-module-tagger

packages/react-server-gulp-module-tagger/README.md

@@ -0,0 +1,64 @@
+# react-server-gulp-module-tagger
+
+A [gulp](http://gulpjs.com) plugin for tagging [react-server](https://www.npmjs.com/package/react-server) logger instances with information about the module they're being used in.
+
+To transpile your source for use with [React Server](https://www.npmjs.com/package/react-server), install gulp and the plugin
+
+```shell
+npm i -D gulp react-server-gulp-module-tagger
+```
+
+Then add the task to your gulpfile
+
+```javascript
+const gulp = require('gulp');
+const tagger = require('react-server-gulp-module-tagger');
+gulp.task('compile', () => {
+    gulp.src('src')
+        .pipe(tagger())
+        .pipe(gulp.dest('dist'));
+});
+```
+
+A compile task might also use [Babel](https://babeljs.io) with the [React Server Babel preset](https://www.npmjs.com/package/babel-preset-react-server) to transpile jsx and
+es 7 for the browser and the server
+
+```javascript
+const gulp = require('gulp');
+const babel = require('gulp-babel');
+const tagger = require('react-server-gulp-module-tagger');
+
+gulp.task('compile', () => {
+    gulp.src('src')
+        .pipe(tagger(
+            trim: 'src.'
+        ))
+        .pipe(babel({ presets: ['react-server'] }))
+        .pipe(gulp.dest('dist'));
+});
+```
+
+Given a [`getLogger`](http://redfin.github.io/react-server/annotated-src/logging) call,
+adds the correct arguments to keep the server and the browser in sync.
+
+For example, given a module in `src/components/my-feature/foo.js`, and using the options
+`{ trim: 'src.' }`
+
+```javascript
+let logger = require("react-server").logging.getLogger(__LOGGER__);
+```
+
+returns a logger instance that will have consistent coloring on the server and
+the client, and that has a human-friendly, readable name that easily maps to
+the file tree (in this example `components.my-feature.foo`).
+
+If you need more than one logger in your module, you can distinguish them
+with labels
+
+```javascript
+var fooLogger = logging.getLogger(__LOGGER__({ label: "foo" }));
+var barLogger = logging.getLogger(__LOGGER__({ label: "bar" }));
+```
+
+Two other tokens, `__CHANNEL__` and `__CACHE__`, are reserved for future use,
+and will also be replaced with a module context.