Add tasks for all the new languages

Task/Palindrome-detection/LiveCode/palindrome-detection.livecode

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+function palindrome txt exact
+    if exact is empty or exact is not false then
+        set caseSensitive to true  --default is false
+    else
+        replace space with empty in txt
+        put lower(txt) into txt
+    end if
+    return txt is reverse(txt)
+end palindrome
+
+function reverse str
+    repeat with i = the length of str down to 1
+        put byte i of str after revstr
+    end repeat
+    return revstr
+end reverse