Fujio compile errors
    
     ----jGRASP exec: gnatmake -g BSTtest.adb
    
    gcc -c -g bsttest.adb
    bsttest.adb:10:09: file "binarysearchtree.ads" not found
    bsttest.adb:10:09: "Bsttest (body)" depends on "Binarysearchtree (body)"
    bsttest.adb:10:09: "Binarysearchtree (body)" depends on "Binarysearchtree (spec)"
    gnatmake: "bsttest.adb" compilation error
    
     ----jGRASP wedge2: exit code for process is 4.
     ----jGRASP: operation complete.