taking into account TESTNAME variable in reftest (see #41)
Use internal mutability for Attr::value.
Fix warning in gfx: "variable does not need to be mutable"
Merge pull request #2695 from Ms2ger/NativeProperties

Introduce a NativeProperties struct; r=jdm
Merge pull request #2696 from saneyuki/fix_warn

Fix warning in gfx: "variable does not need to be mutable"; r=Ms2ger
Merge pull request #2681 from saneyuki/attr

Use internal mutability for Attr::value; r=jdm
Remove "DerefMut" implementation from Root/JSRef.
Remove needless mutabilities from script crate.
Merge pull request #2691 from schaars/testname

taking into account TESTNAME variable in reftest (see #41)
Merge pull request #2697 from saneyuki/js

Remove "DerefMut" implementation from Root/JSRef; r=jdm
Introduce static makeNativeName methods to share code with the upcoming static members.
Implement static methods.
Implement static attributes.