fixed whitespaces
response action and endpoint filter
fixed naming!
updated readme
optimized link parser
link header can be relative
replaced regexp with path
removed whitespaces
added <a /> support

see:
https://github.com/converspace/webmention/commit/9e4455c3ae5e64ccd87befb
95538cafb67ce1fea
added "port" support
updated readme
moved header and added filter

so other plugins can change the response header
fixed comment detection
removed whitespace
returns the comment link
fixed readme
added a default request "action"

added a default request "action" to be more flexible and to handle more
than mentions on posts and pages
new version