Fixing wrong paths - thanks to tip from Daniel Harper in the comments

I didn't intend to put the assets into layout.html.twig (in the bundle), I had
intended for them to live in base.html.twig (in app), which is what we do in
the video. This avoids the problem with adding the bundles config for assetic
in config.yml

http://knpuniversity.com/screencast/symfony2-ep1/assets#comment-1315658397
Updating stubs for new forms markup - thanks to comments on the page about this error!
Fixing for markup from an earlier version of Symfony - thanks to Daniel Harper and palebluedot77

http://knpuniversity.com/screencast/symfony2-ep1/assets#comment-1315658397
Small tweak to styling

After changing it so that Symfony renders the buttons (worked better with generated CRUD code),
this makes the styling *slightly* better, since we lost our .button class
Small tweak to styling

After changing it so that Symfony renders the buttons (worked better with generated CRUD code),
this makes the styling *slightly* better, since we lost our .button class