Add Metatag module for improved SEO

Someone beat me to it :-D

Something to get people started. This will download 1.0-beta7 and install the basic Metatag module, along with the OpenGraph and Twitter Cards submodules.

FYI we're working on improving the commerce-related functionality (#2103321: Identify new/missing/incomplete ecommerce-related meta tags) so stay tuned for more.

Just to post it here too, my plans for the Commerce integration for Metatag are:

• Work out if there are additional meta tags that would be useful to support.
• Work out what should be default values for these meta tags and document them to help people who are building their own Commerce sites.
• Provide out-of-the-box default values for Commerce Kickstart based on the above.

I'll get back to it once I get the next beta release out.

Not yet, we could use some assistance on #2219945: Provide turn-key solution for Commerce Kickstart.

Kickstart is feature frozen.