tried to match R object name an JS variable name

  - there's now an option "object.names" in rk.JS.vars(), which will try to keep close to the original R object name when coming up with JS variable names.
    this will however lead to massive chaos if you use it together with rk.JS.scan(), as the latter cannot access R object names, but only the IDs in XML tree structures.
    therefore, it only makes some sense to use if you don't scan for variables but define them all on your own.