patch to Calc1D and Calc2D to deal with problem of threads not handling a stop thread properly causing 2 threads to trample on each other.  Thread issues in general may be at the heart of many of our instabilities and should be investigated further.
patch to Calc1D and Calc2D to deal with problem of threads not handling a stop thread properly causing 2 threads to trample on each other.  Thread issues in general may be at the heart of many of our instabilities and should be investigated further.

lewisodriscoll/sasview,SasView/sasview,lewisodriscoll/sasview,SasView/sasview,lewisodriscoll/sasview,lewisodriscoll/sasview,SasView/sasview,lewisodriscoll/sasview,SasView/sasview,SasView/sasview,SasView/sasview