Merge pull request coreshop#734 from coreshop/release/2.0.0

[Release] Prepare Final 2.0.0 release

Merge pull request coreshop#693 from coreshop/issue-689

[FrontendBundle] translate flash messages in the controller to make them more consistant

keep minimum stability at dev, prefer-stable takes care about that an…

…yway

Prepare beta.4 Release

Merge pull request coreshop#550 from coreshop/beta-3

[Beta.3] prepare beta.3 release

Merge pull request coreshop#477 from coreshop/beta-2

[Beta.2] beta.2 release

Merge pull request coreshop#408 from coreshop/beta-1

[Beta.1] Prepare Release

[OrderBundle] register grid config services

[CoreBundle] bump version to alpha-4