Release Summary for 4.0.20
  Changes to 4.0 after version 4.0.19
  * Joris Tirado [UI-2588: Create method to centralize number validation and avoid errors in duplicated code](https://github.com/2600hz/monster-ui/commit/db1a343badf34945aeae6ec6b8394a62c984ec7d)
  * Jean-Roch Maitre [OOB: fixing handlebar ifInArray helper to handle undefined case](https://github.com/2600hz/monster-ui/commit/c108d766f20e58600a5e6dacbd1f6995b038c36d)
  * Joris Tirado [UI-2559: Create new hexadecimal validation rule](https://github.com/2600hz/monster-ui/commit/c3156f1319d655af0fd851f8a30684c969b24cd3)
  * Joris Tirado [OOB: Create Handlebars helper to generate signal indicator](https://github.com/2600hz/monster-ui/commit/ba074fe3ed94abd18779c534ef138129e20b0f12)
 -- 2600Hz Offical <packages@2600hz.com>  Mon, 06 Feb 2017 07:51:38 PM +0000
