Features: Add cxx_raw_string_literals.
Features: Add cxx_reference_qualified_functions.
Features: Add cxx_rvalue_references.
Features: Add cxx_alias_templates.
Features: Add cxx_user_literals.
Features: Add cxx_unicode_literals.
Features: Add cxx_unrestricted_unions.
Merge topic 'cxx11-features' into next

e977281b Features: Add cxx_unrestricted_unions.
2eeb4c42 Features: Add cxx_unicode_literals.
a9c46a28 Features: Add cxx_user_literals.
44fee553 Features: Add cxx_alias_templates.
8b301433 Features: Add cxx_rvalue_references.
aa689a96 Features: Add cxx_reference_qualified_functions.
295ed365 Features: Add cxx_raw_string_literals.