[VarDumper] casters for exceptions representation
[VarDumper] casters for SPL data structures
[VarDumper] casters for PDO related objects
[VarDumper] casters for Doctrine objects
[VarDumper] casters for DOM objects
[VarDumper] interface for dumping collected variables
[VarDumper] CLI dedicated dumper and related abstract
[VarDumper] HTML variant of the CLI dumper
[VarDumper] tests for CliDumper
[VarDumper] tests for HtmlDumper
[VarDumper] README, LICENSE and composer.json
added the possibility to return null from SimplePreAuthenticationListener
fixed typo
[DebugBundle] global dump() function for daily use
[DebugBundle] dump() + better Symfony glue
[DebugBundle] adjust after review
[DebugBundle] add tests for twig and for the bundle
[VarDumper] add Stub objects for cutting cleanly and dumping consts
[HttpKernel] tests for DumpListener
[HttpKernel] add tests for DumpDataCollector