Fixed appending for flv. Refactored lots of recording releated code

Author: mondain

pom.xml

@@ -3,7 +3,7 @@
     <parent>
         <groupId>org.red5</groupId>
         <artifactId>red5-parent</artifactId>
-        <version>1.0.10-M2</version>
+        <version>1.0.10-M3</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
     <artifactId>websocket</artifactId>