Add Guidestar rating to Donations page

[masinter]

<a href="https://www.guidestar.org/profile/shared/31fad8e3-de97-4d71-9401-b896bf085498" target="_blank"><img src="https://widgets.guidestar.org/TransparencySeal/10019973" /></a>

FYI https://www.guidestar.org/Profile/ViewCCPdf?ein=87-2528093

[pamoroso]

When visiting https://www.guidestar.org/Profile/ViewCCPdf?ein=87-2528093 I get the error "You do not have access to the requested page".

[stumbo]

Maybe go with this link:  https://www.guidestar.org/profile/87-2528093?

[pamoroso]

Addressed by PR #228.