Clean up middleman-livereload, use the correct file ignore API, remove grace_period hack and other nastiness.
Remove "grace_period" from docs
Remove "api_version" from docs
Explicitly use the vendored livereload.js, otherwise it will try to load it from Middleman's livereload server, which will never have it
Merge pull request #48 from bhollis/master

Clean up middleman-livereload