Added simple usage information to the README (ref squizlabs#2583, squ…

…izlabs#2581)

README.md

@@ -74,6 +74,24 @@ You can also download the PHP_CodeSniffer source and run the `phpcs` and `phpcbf
     php bin/phpcs -h
     php bin/phpcbf -h
 
+## Getting Started
+
+The default coding standard used by PHP_CodeSniffer is the PEAR coding standard. To check a file against the PEAR coding standard, simply specify the file's location:
+
+    $ phpcs /path/to/code/myfile.php
+
+Or if you wish to check an entire directory you can specify the directory location instead of a file.
+
+    $ phpcs /path/to/code-directory
+
+If you wish to check your code against the PSR-2 coding standard, use the `--standard` command line argument:
+
+    $ phpcs --standard=PSR2 /path/to/code-directory
+
+If PHP_CodeSniffer finds any coding standard errors, a report will be shown after running the command.
+
+Full usage information and example reports are available on the [usage page](https://github.com/squizlabs/PHP_CodeSniffer/wiki/Usage).
+
 ## Documentation
 
 The documentation for PHP_CodeSniffer is available on the [Github wiki](https://github.com/squizlabs/PHP_CodeSniffer/wiki).