Add counted() to Inflector Helper

[MGatner]

Description
This adds another inflector function to make easy counted words (e.g. from database results):

$users = $userModel->findAll();
echo counted(count($users), 'users'); // "5 users" or "1 user"

Checklist:

• Securely signed commits
• Component(s) with PHPdocs
• Unit testing, with >80% coverage
• User guide updated
• Conforms to style guide

[lonnieezell]

This is probably fine, but part of me says - what about non-Arabic numbers for other locales?

[MGatner]

No clue. :) How are they handled by count()?

EDIT: Ohhh I think I see what you mean, because we output the literal number. I will look into it.

[MGatner]

This is messy. I think since counted()'s dependent functions (singular, plural, is_pluralizable) are hard-coded to English its the best we can do for now. But maybe an international pass at the Inflector helper at some point...

[lonnieezell]

Agreed on that. I mean, technically for the numbers we could use the intl library, but doesn't help with pluralization, I don't think, so yeah. Stick with English for now on this.