Add icon: Features

[davewhitley]

@folletto Do we need a "features" icon (puzzle piece) and "price" icon (paper currency) for themes? They are on the list of icons we need made, but I know you are working on the theme showcase and I was wondering if you plan on using those 2 icons.

[davewhitley]

Looks like the paper currency icon is also being used for billing:

[justinkropp]

Seems like we should develop something new for Billing History. Maybe something more akin to a receipt: https://thenounproject.com/search?q=receipt&i=143307

[folletto]

I guess we need both, but, I've yet to reach that stage of design, so I can't tell for sure, sorry. Probably in a few weeks I will know. ;)

[davewhitley]

closing in favor of #53