Removed most of AcmeDemoBundle. Removed travis config.
Disable web configurator
Removed Requirements file
Swiftmailer is removed
Removed doctrine bundle and orm

Parts of doctrine are not removed as other packages require them
GeneratorBundle is removed
DistributionBundle is removed from kernel.

It is left in composer to run scripts. Scripts do not require bundle to be registered in the kernel.
Purpose of the repo and instructions were added to README
Removed Readme and Upgrading
Removed twig-extensions
Removed assetic
Removed composer-parameter-handler
Removed FrameworkExtraBundle