Adds more documentation

Author: heiglandreas

README.md

@@ -5,13 +5,18 @@
 
 A PHP-wrapper to the Ghostscript-CLI
 
-## Installation:                                                              |
+## Installation
 
 This package is best installed using [composer](https://getcomposer.org).
 
     composer require org_heigl/ghostscript
 
- ## Usage:                                                              |
+## Documentation
+
+You can find the documentation for the library at https://heiglandreas.github.io/Org_Heigl_Ghostscript
+
+## Usage
+
 ```
 <?php
 use Org_Heigl\Ghostscript\Ghostscript;

doc/index.md

@@ -4,4 +4,9 @@ A wrapper to the Ghostscript-CLI
 
 ## Installation
 
-This library is best installed using [composer](https://getcomposer.org)
+This library is best installed using [composer](https://getcomposer.org)
+
+## Further Documentation
+
+ * [API (DocBlock)](api/)
+ * [Code-Coverage](https://coveralls.io/github/heiglandreas/Org_Heigl_Ghostscript)

doc/usage.md

@@ -0,0 +1,30 @@
+# Basic usage
+
+## Convert a PDF- or Postscript-File to a JPEG
+
+```
+<?php
+use Org_Heigl\Ghostscript\Ghostscript;
+
+// Create the Ghostscript-Wrapper
+$gs = new Ghostscript ();
+
+// Set the output-device
+$gs->setDevice('jpeg')
+// Set the input file
+   ->setInputFile('path/to/my/ps/or/pdf/file')
+// Set the output file that will be created in the same directory as the input
+   ->setOutputFile('output')
+// Set the resolution to 96 pixel per inch
+   ->setResolution(96)
+// Set Text-antialiasing to the highest level
+   ->setTextAntiAliasing(Ghostscript::ANTIALIASING_HIGH);
+// Set the jpeg-quality to 100 (This is device-dependent!)
+   ->getDevice()->setQuality(100);
+// convert the input file to an image
+if (true === $gs->render()) {
+    echo 'success';
+} else {
+    echo 'some error occured';
+}
+```

mkdocs.yml

@@ -2,6 +2,8 @@ docs_dir: doc
 site_dir: build/html
 pages:
     - index.md
+    - "Usage":
+      - "Basic Usage" : usage.md
 site_name: Org_Heigl\Ghostscript
 site_description: A wrapper to the Ghostscript CLI
 repo_url: 'https://github.com/heiglandreas/Org_Heigl_Ghostscript'