Update README.

README.md

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 scrappy
 =======
-Scrappy (code-name) is the HMR command-line application for OS X, Windows, and Linux.
+The original Node.js-based proof-of-concept command line tool for **FluentCV**.
+
+## Use
+
+First make sure [Node.js][4] and [NPM][5] are installed. Then:
+
+1. Install the latest official [PhantomJS][2] and [wkhtmltopdf][3] binaries for your platform.
+2. Verify PhantomJS and wkhtml are accessible on your path.
+3. Run `npm install` followed by `npm link`.
+4. Run Scrappy from with `scrappy [input] [output] -t [theme]`. For example:
+
+  ```bash
+  # Generate all resume formats (HTML, PDF, DOC, TXT)
+  scrappy resume.json resume.all -t informatic
+
+  # Generate a specific resume format
+  scrappy resume.json resume.html -t informatic
+  scrappy resume.json resume.txt -t informatic
+  scrappy resume.json resume.pdf -t informatic
+  scrappy resume.json resume.doc -t informatic
+  ```
+
+5. Success looks like this:
+
+  ```
+  *** Scrappy v0.1.0 ***
+  Reading JSON resume: foo/resume.json
+  Generating HTML resume: out/resume.html
+  Generating TXT resume: out/resume.txt
+  Generating DOC resume: out/resume.doc
+  Generating PDF resume: out/resume.pdf
+  ```
+
+## Advanced
+
+You can **merge multiple resumes** by specifying them in order from most generic to most specific:
+
+```bash
+# Merge specific.json onto base.json and generate all formats
+scrappy base.json specific.json resume.all -t informatic
+```
+
+You can specify **multiple output filenames** instead of using `.all`:
+
+```bash
+# Merge specific.json onto base.json and generate r1.doc and r2.pdf
+scrappy base.json specific.json r1.doc r2.pdf -t informatic
+```
+
+You can omit the output file(s) and/or theme completely:
+
+```bash
+# Equivalent to "scrappy resume.json resume.all -t default"
+scrappy resume.json
+```
 
 ## License
 
 Proprietary and confidential. See [LICENSE.md][1] for details.
 
 [1]: LICENSE.md
+[2]: http://phantomjs.org/
+[3]: http://wkhtmltopdf.org/
+[4]: https://nodejs.org/
+[5]: https://www.npmjs.com/