Add Do You Have The Time? as an elixir til

elixir/do-you-have-the-time.md

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+# Do You Have The Time?
+
+Elixir doesn't come with any standard ways of getting at or working with
+time. There are packages like [Timex](https://github.com/bitwalker/timex)
+out there that we can pull in to our projects. However, if we don't have
+need for a full-featured date/time library, we can opt for a simpler
+solution.
+
+Erlang can give us the time.
+
+```elixir
+defmodule TickTock do
+  def current_time do
+    {hh,mm,ss} = :erlang.time
+    "#{hh}:#{mm}:#{ss}"
+  end
+end
+
+> TickTock.current_time
+"11:47:13"
+```