Classes: Add basic support for properties

This adds the properties to the prototype and the constructor.

BUG=v8:3330
LOG=Y
R=dslomov@chromium.org

Review URL: https://codereview.chromium.org/680993003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24934 ce2b1a6d-e550-0410-aec6-3dcde31c8c00