Add option to disable the exit button and action
new display format: plain text with clickable URLs
plain text html-decorated on the client side
Allow activesupport ~> 4.0.0

Closes #98 (didn't want to update Gemfile.lock so extensively)
Don't guarantee we'll work on HAML 4.1+
decoration of the message body in iframe's load event handler
save separator sizing in localStorage if available
ignore common sendmail commands
Merge pull request #110 from maxgalbu/ignorecommoncommands

Ignore common sendmail options
Merge pull request #108 from toy/remember-height

Save separator sizing in localStorage if available
Merge pull request #97 from igneus/url-clickable-in-plain-text

New display format: plain text with clickable URLs
Expose whole options hash instead of using define_method
Tidy up exit behaviour
Refine the no-exit implementaton a little
Merge branch 'no-exit' [closes #92]
add information for PHP users to set sendmail_path using mailcatcher with a different SMTP ip (usefull on OSX because port 1025 was used in my case)
Refine language a little
Syncing output when running in foreground.
Merge pull request #121 from jjoos/master

Syncing output when running in foreground.
Example mail with = problem at the end of quoted-printable

And a workaround for it.