Add tasks for all the new languages

Task/Semordnilap/Phix/semordnilap.phix

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+sequence words={}, semilordnaps={}
+object word
+constant fn = open("demo\\unixdict.txt","r")
+
+while 1 do
+    word = trim(gets(fn))
+    if atom(word) then exit end if
+    if find(reverse(word),words) then
+        semilordnaps = append(semilordnaps,word)
+    end if
+    words = append(words,word)
+end while
+
+close(fn)
+
+?length(semilordnaps)
+for i=1 to 5 do
+    word = semilordnaps[i]
+    printf(1,"%s - %s\n",{word,reverse(word)})
+end for