v0.9.3

• 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