Adding new color for git commits

Git commits get a new color in this scheme. I'd love to re-do the whole
homepage but this is a start to make things stand out more.
Ignore Sentry logging if DSN_VALUE not set

Right now the site errors if we don't have a sentry DSN value. Obviously
not every deploy will use Sentry and so this shouldn't happen.

This should also be fixed up stream in the outline project.
Merge branch 'feature/clean-up-icons' into develop
Merge branch 'hotfix/settings-busted-on-sentry' into develop

* hotfix/settings-busted-on-sentry:
  Ignore Sentry logging if DSN_VALUE not set
Updating changelog.