Add Permissions For Users

[Eein]

It would be really nice to add permissions to prevent certain users for accessing the SEO tab. We have clients that like to mess with things and blame us later. I think this is really important especially if using the Static Pages plugin.

Shouldn't require too much work:
Documentation here:
http://octobercms.com/docs/backend/users

If it's not a huge priority for you, I'll likely implement it at a later date and issue a pull request. Thanks!

[plyusninva]

+1