Adapt path spec (use slash var) to make it work in MSWindows

Use a OS interdependent way of specifying file paths

    IEDict>>initialize

    .....

    slash := FileDirectory slash.
    fileStream := FileStream oldFileNamed: 
       '..', slash, 'Cuis-Ia-En', slash, 'iedict.txt'.  
    "NB: Relative Pathname"
    .....