better header name

README.markdown

@@ -9,7 +9,7 @@ http://www.sqlite.org/faq.html
 
 Since FMDB is built on top of SQLite, you're going to want to read this page top to bottom at least once.  And while you're there, make sure to bookmark the SQLite Documentation page: http://www.sqlite.org/docs.html
 
-## Documentation:
+## FMDB Class Reference:
 http://ccgus.github.io/fmdb/html/index.html
 
 ## Automatic Reference Counting (ARC) or Manual Memory Management?