Allow custom control descriptions in the Customizer. WordPress 4.0 now supports these for Core-supported controls, so plugins that extend the Customizer should also allow them for more contextual help with theme integrations. This fixes https://github.com/Automattic/site-logo/issues/2.
Merge branch 'master' of github.com:philiparthurmoore/site-logo into philiparthurmoore-master
Display control descriptions, new to WordPress 4.0. Props philiparthurmoore. Closes #2, closes #5.
Merge branch 'philiparthurmoore-master'