Add elfeed-move-to-first-empty-line.
Stop using the broken url-http-end-of-headers var.
Update elfeed-add-feed to new feeds structure.

It would crash interacting with a feeds list with autotagging.
Fix docstring typo.
Add more TAB bindings for navigating links
Disable buffer undo in show and search (fixes #50).
Add option to not truncate URLs (fixes #52).

The option is elfeed-show-truncate-long-urls.
return to *elfeed-search* then search, bound to s