Somewhat of an ugly workaround for param mix not handling extremes too well and not fully appling some settings.
At the end of the interpolation time, the finial settings will be applied forcefully.
Idealy LLWLParamSet::mix should be perfect and doing that should have no effect.
Lots of cleanup in the floater classes. Not sure every decision was correct
but it compiles now. Doesn't link yet.
(resubmitted by Vadim ProductEngine)
windlight14 which have passed QA (up through r79932).
svn merge -r 80831:80833 svn+ssh://svn.lindenlab.com/svn/linden/branches/merge_windlight14_r80620