Thanks!
Not yet. Putting w1_convert_all into slave directory is not right conceptually (but it was the simplest way to do ) and I suspect it might not work correctly with multiple one-wire masters configuration. I should get the ds2482s-800 next week, so I will be able to test modified w1-therm with the multiple masters configuration.
So I will make some additional tests, and probably I will make some changes. Then I will create a pull request.