Add HTTP Swagger client generator (#250)

WoofWare.Myriad.Plugins/Text.fs

@@ -0,0 +1,11 @@
+namespace WoofWare.Myriad.Plugins
+
+open System
+
+[<AutoOpen>]
+module internal Text =
+    let (|StartsWith|_|) (prefix : string) (s : string) : string option =
+        if s.StartsWith (prefix, StringComparison.Ordinal) then
+            Some (s.Substring prefix.Length)
+        else
+            None