reorganize

docs/README.md

-## Tutorials
+## For Users
 
 * [Getting Started](getting-started.md)
+* [Users Guide](users-guide.md)
 
-## Guides
+## For Administrators
 
-* [Users Guide](users-guide.md)
+* [Installation Guide](installation-guide.md)
 * [Administration Guide](administration-guide.md)
+* [Metadata Guide](metadata-guide.md)
+
+## Advanced Topics 
+
+* [Data Warehousing Guide](data-warehousing.md)
 * [ETL Guide](etl-guide.md)
+
+## For Developers
 * [Developers Guide](developers-guide.md)
-* [Installation Guide](installation-guide.md)
-* [Data Warehousing Guide](data-warehousing.md)
-* [Metadata Guide](metadata-guide.md)
+* [API Reference](uberdoc.html)
 
 ## Reference
-* [API Reference](uberdoc.html)
 * [Anonymous Information Collection Reference](information-collection.md)
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