Fix Issue heapwolf#25: Inappropriate Redrawn Multi-Line Asks

heapwolf#25

Prompts were causing bad user experience in situations where
the prompt contains multiple lines. This is because prompt-sync
will redraw the prompt as you type, and assumes it only takes
up one line.

The fix provided splits the provided ask by newline, prints
all but the last line only once, and assigns the final line
to the ask variable used for the remainder of the module.

index.js

@@ -76,6 +76,7 @@ function create(config) {
 
     if (ask) {
       process.stdout.write(ask);
+      ask = ask.split(/\r?\n/).pop();
     }
 
     var cycle = 0;