Add "app" to the .org intro paragraph.

[willmot]

Migrated from ​https://core.trac.wordpress.org/ticket/22440

I'd like to propose that we change the .org intro paragraph from:

WordPress is web software you can use to create a beautiful website or blog. We like to say that WordPress is both free and priceless at the same time.

To:

WordPress is web software you can use to create a beautiful app, website or blog. We like to say that WordPress is both free and priceless at the same time.

WordPress is being used to build web apps, see ​Matt's WPSF 2012 keynote.

I also spoke to @matt about this at WPCS, he seemed to liked the idea.

Suggestion from ​raggedrobins

I wouldn't lead with "app". Perhaps instead:

WordPress is web software you can use to create a beautiful website, blog, or web application. We like to say that WordPress is both free and priceless at the same time.

[netweb]

Restored original ticket formatting for improved readability.

[matt]

It's fine, but don't forget the oxford comma.

[coffee2code]

Fixed in [dotorg-11024].

[willmot]

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