Added join words function.

Wrote script test as well.

WetPancake/Script.fsx

@@ -13,6 +13,7 @@ open SystemServices
 open DataAccess
 open DataCleaning
 open System
+open DataProcessing
 
 // System Services
 let ss_number = PickRandomNumber 10
@@ -43,5 +44,6 @@ let dc_replace5 =
 let dc_split = SplitText @"\s+" "This is a test string."
 
 // Data Processing
-// let dp_words = build seq <--- You are here
-// write split word function for test
+let dp_words =
+    let words = ["This"; "is"; "a"; "test"; "."]
+    JoinWords words