add changelog

changelog.txt

@@ -1,4 +1,21 @@
 
+0.9.3
+* Added commands to generate boilerplate source code for controller, commands 
+  and schema
+* When the default writer gets determined it respects now the list of supported
+  writers
+* Implemented priority queue to give reader and write a priority in which order 
+  they get used
+* Changed default html template file extension from .tpl to .html
+* Added abstract template writer which can be used to generate an output with
+  an template engine
+* Added svg writer which uses the abstract template writer
+* Add possibility to set an content negotiation rule for an specific writer
+* Restricted the TableInterface::TYPE_* constants to the subset of supported 
+  types from the doctrine dbal and use the dbal for type conversion
+* Added command to generate an bootstrap cache which can be included at startup
+  to increase performance
+
 0.9.2
 * Integrated JMS serializer
 * Removed payment and handler classes