Update CHANGELOG for 3.0.12
Support Haml 4. Tests only run with Haml 4 now. Fixes #783
Merge pull request #789 from bhollis/haml

Support Haml 4. Tests only run with Haml 4 now.
update listen dep
prep pre
latest listen supports new wdm
Bundler advises not to use a source symbol anymore

- https://github.com/carlhuda/bundler/commit/d30026e9c8fc6c98478120866a47ca5b619251b8
Merge branch '3.0-stable' of github.com:middleman/middleman into 3.0-stable
adapt to bundler changes, add ruby 2.0 to tests, prep release
loosen testing deps
update sprockets dep
bump
what about no https travis?
avoid broken version of i18n gem
try again
Serve extensionless files or dotfiles with text/plain MIME type, and remove Sitemap::Resource#mime_type.
Merge remote-tracking branch 'origin/3.0-stable'

Conflicts:
	.travis.yml
	Gemfile
	middleman-core/lib/middleman-core/version.rb
	middleman-core/middleman-core-x86-mingw32.gemspec
	middleman-core/middleman-core.gemspec