Add commentary to elfeed-lib.
Add commentary to elfeed-lib.

emacsmirror/elfeed,seblemaguer/elfeed,emacsmirror/elfeed,daimrod/elfeed,abo-abo/elfeed,seblemaguer/elfeed,daimrod/elfeed,algernon/elfeed,skeeto/elfeed,skeeto/elfeed,algernon/elfeed,holomorph/elfeed,jinnovation/elfeed,holomorph/elfeed,jinnovation/elfeed