Added CoffeeScript

CoffeeScript/XOREncryption.coffee

@@ -0,0 +1,16 @@
+encryptDecrypt = (input) ->
+  key = ['K', 'C', 'Q'] #Can be any chars, and any size array
+  output = ""
+
+  i = 0
+  while i < input.length
+    charCode = input.charCodeAt(i) ^ key[i % key.length].charCodeAt(0)
+    output += String.fromCharCode charCode
+    i++
+  return output
+
+encrypted = encryptDecrypt "kylewbanks.com"
+console.log("Encrypted:" + encrypted)
+
+decrypted = encryptDecrypt encrypted
+console.log("Decrypted:" + decrypted)