Implement source_range tracking for @media rules
Make this statement less ambiguous.
Add output style in the @extend section
Merge pull request #762 from hlb/patch-2

Add output style in the @extend section
Handle duplicated test names
Avoid accidently finding files in the development folder during test runs.
Merge branch 'stable'

Conflicts:
	test/sass/extend_test.rb
Merge pull request #752 from crdev/media_source_range

Implement source_range tracking for @media rules
Add grey to the list of Sass Script colors.

Addresses #738
Refactor color names to support transparent colors.
Support "transparent" as a color name.

Closes #754
Merge branch 'color-names'
Merge remote-tracking branch 'origin/master'
Move SassScript parse nodes into Sass::Script::Tree.
Rename Sass::Script::Literal to Value.
Move SassScript value classes to lib/sass/script/value.

Also rename Sass::Script::Value to Sass::Script::Value::Base.
Attach source range information to SassScript Lexer tokens.
Improve List#inspect
Clean up source range assignment in the SassScript parser.
Make sure Lexer returns the correct line/offset.