Add tasks for all the new languages

Task/Palindrome-detection/Swift/palindrome-detection-1.swift

@@ -0,0 +1,19 @@
+import Foundation
+
+// Allow for easy character checking
+extension String {
+    subscript (i: Int) -> String {
+        return String(Array(self)[i])
+    }
+}
+
+func isPalindrome(str:String) -> Bool {
+    if (count(str) == 0 || count(str) == 1) {
+        return true
+    }
+    let removeRange = Range<String.Index>(start: advance(str.startIndex, 1), end: advance(str.endIndex, -1))
+    if (str[0] == str[count(str) - 1]) {
+        return isPalindrome(str.substringWithRange(removeRange))
+    }
+    return false
+}

Task/Palindrome-detection/Swift/palindrome-detection-2.swift

@@ -0,0 +1,5 @@
+func isPal(str: String) -> Bool {
+  let c = str.characters
+  return lazy(c).reverse()
+    .startsWith(c[c.startIndex...advance(c.startIndex, c.count / 2)])
+}