Unclear that 1.x pages are not for the current version

[gmethvin]

All the 1.x pages (including those like https://www.playframework.com/modules/mongo-1.1/home) should have an obvious banner to indicate they are not for the current version of Play.

Unfortunately it's very common for new Play users to find these pages on Google and think they work for the current version.

I understand Play 1.x is still maintained, but I'm not sure the current setup strikes the right balance. Maybe it would be better to have a separate "Play 1" site with different branding to make it clear.

[wsargent]

Also see https://github.com/playframework/playframework.com/issues/200