Fix combo of compass-import-once and sass-globs. Closes middleman/middleman-sprockets#56
Fix after_render

Example usage from config.rb:

after_render do |content, path, locs, template_class|
  # restore character entities such as &amp;#96;
  content ||= ''
  content.gsub! '&amp;', '&'
  content
end
Merge pull request #1278 from bootstraponline/fix_after_render

Fix after_render
Revert "Add :format and :keep_original options to :asset_hash. Closes #1257"

This reverts commit 1f98d0f4f01cde226df3e1f06d25b839fc34d753.

Conflicts:
	middleman-core/lib/middleman-core/extensions/asset_hash.rb
Merge pull request #1280 from bhollis/revert-asset-hash

Revert 1f98d0f
Merge pull request #1279 from bhollis/extensions

Resource list manipulator priority
Fixes to deal with Padrino 0.12.2 release
Fix tests after Padrino 0.12.2 release
Merge remote-tracking branch 'origin/v3-stable'

Conflicts:
	middleman-core/lib/middleman-core/core_extensions/rendering.rb
	middleman/middleman.gemspec
Fix before_render after change to hooks-0.4.0. Related to #1278.
Improve documentation and variable naming for Middleman::Extensions
Improve documentation and mildly clean up core_extensions/extensions.rb
Clean up extension activation, helper registration, and sprockets autoload
Clean up some Rubocop warnings that were previously suppressed.
Document and cleanup TemplateContext class.
Removed wrap_layout
Allow extensions to optionally register to be automatically activated before configuration.
Move some explicitly activated extensions to be auto activate
Convert FileWatcher to a real extension
Convert external data to a real extension