Remove .DS_Store from gitignore.
Use single quotes.
Add gem files.
Switch from "literal" to "raw" tags.

I have waffled on this issue before:

-   2daa4c283c0c4cf77e9aee567d2227be75625cea
-   313f417ab75cca67ffa79cbed52eb45fd33a3501
-   443a14a47912b3f1b63fb3554d4ce967f6f3cb2b
-   478857b85555020b25e77061a24216be905f4f9b
-   4ccccb735700af793b542aa5478a2cd7f066c7dd
-   8a42cfbe2a3384715fc7b81838f8ab389959b203
-   9f6208849ee80f1896ba708f1bf9cefd037dc62c
-   b2915d6166bd1e049ff16adb9c56f1daee0a06a2
-   ccc211384b61885c1c6b0e49dbc1e287e1b42f88
-   d7381cc4433256856001f51e65c4034cbb341dcf

I'm trying again now because I'm running this locally using the
gems GitHub claims to be using and "{% literal %}" causes problems.
"{% raw %}" does not.

I don't fully expect this build to succeed, but it would be great
if it did.