Added .authentication(user,password)
Added .visible(selector)
added .exists()
Merge pull request #67 from johntitus/ex

Add .exists() method
Merge branch 'johntitus-vis'
merging
Merge pull request #65 from johntitus/auth

Add .authentication(user,password)
Release 1.4.0
adding docs and support for ssl, proxy and other cli args
adding webSecurity option and updating sslProtocol default
Merge pull request #76 from segmentio/add/ssl-proxy-args

adding docs and support for ssl, proxy and other cli args
Release 1.5.0