Add usage examples to README (close #22)

README.md

@@ -11,6 +11,51 @@ commonform --help
 
 `commonform-cli` is tested on the current Stable and Long Term Support (LTS) versions of [Node.js](https://nodejs.org). Please see the [Travis CI configuration file](./.travis.yml).
 
+# Examples
+
+You may like to download a few sample form documents to start:
+
+```shellsession
+$ git clone https://github.com/commonform/commonform-samples samples
+$ cd samples
+```
+
+To format a form, say the Orrick Mutual NDA, for reading in the terminal:
+
+```shellsession
+$ commonform render Orrick-Mutual-NDA.commonform
+```
+
+To convert to OfficeOpenXML (.docx) for Microsoft Word:
+
+```shellsession
+$ commonform render --format docx Orrick-Mutual-NDA.commonform
+```
+
+And with a title:
+
+```shellsession
+$ commonform render --title "Mutual Nondisclosure Agrement" --format docx Orrick-Mutual-NDA.commonform
+```
+
+To check a form for technical errors:
+
+```shellsession
+$ commonform lint SAFE-MFN.commonform
+```
+
+And to view automated style critiques:
+
+```shellsession
+$ commonform critique IBM-Cloud-Services-Agreement.commonform
+```
+
+To see a list of additional subcommands and their options:
+
+```shellsession
+$ commonform --usage
+```
+
 # Related Projects
 
 For [Vim](https://github.com/commonform/vim-commonform) users there is also [vim-commonform](https://github.com/commonform/vim-commonform) with syntax highlighting and conveniences for Common Form markup.