Fixing the NS that is generated in the templates. The convention is to use / for plugin NS but this conflicts with phps \ for the php NS.
Adding an error when an user attempts to use a plugin name that is using \ instead of the / for the plugins in the bake shell.
Merge branch '3.0' of git://github.com/cakephp/cakephp into fix/bake-plugin-ns
Moving the plugin namespace fixing code to a better place in the tasks.
Merge pull request #5033 from burzum/fix/bake-plugin-ns

Fix/bake plugin ns