Deprecation warnings from using sns-extension with Radiant 0.9

[weyus]

DEPRECATION WARNING: define_routes has been deprecated in favor of your extension's config/routes.rb. (called from /Users/weyus/Documents/workspace/koached-content/vendor/radiant/vendor/extensions/sns/sns_extension.rb:12)
DEPRECATION WARNING: admin.tabs.add is no longer supported in Radiant 0.9.x. Please update your code to use:
tab "Content" do
add_item(...)
end. (called from activate at /Users/weyus/Documents/workspace/koached-content/vendor/radiant/vendor/extensions/sns/sns_extension.rb:25)
DEPRECATION WARNING: admin.tabs.add is no longer supported in Radiant 0.9.x. Please update your code to use:
tab "Content" do
add_item(...)
end. (called from activate at /Users/weyus/Documents/workspace/koached-content/vendor/radiant/vendor/extensions/sns/sns_extension.rb:26)