Add node modules and new code for release (#39)

Co-authored-by: tbarnes94 <tbarnes94@users.noreply.github.com>

node_modules/performance-now/test/scripts/delayed-call.coffee

@@ -0,0 +1,11 @@
+#!/usr/bin/env ./node_modules/.bin/coffee
+
+###
+Expected output is a number above 350 and below 600.
+The time reported is relative to the time the node.js process was started
+this is approximately at `(Date.now() process.uptime() * 1000)`
+###
+
+delay = require "call-delayed"
+now = require "../../lib/performance-now"
+delay 250, -> console.log now().toFixed 3

node_modules/performance-now/test/scripts/delayed-require.coffee

@@ -0,0 +1,12 @@
+#!/usr/bin/env ./node_modules/.bin/coffee
+
+###
+Expected output is a number above 350 and below 600.
+The time reported is relative to the time the node.js process was started
+this is approximately at `(Date.now() process.uptime() * 1000)`
+###
+
+delay = require "call-delayed"
+delay 250, ->
+  now = require "../../lib/performance-now"
+  console.log now().toFixed 3

node_modules/performance-now/test/scripts/difference.coffee

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+#!/usr/bin/env ./node_modules/.bin/coffee
+
+# Expected output is above 0.005 and below 0.07.
+
+now = require('../../lib/performance-now')
+console.log -(now() - now()).toFixed 3

node_modules/performance-now/test/scripts/initial-value.coffee

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+#!/usr/bin/env ./node_modules/.bin/coffee
+
+###
+Expected output is a number above 100 and below 350.
+The time reported is relative to the time the node.js process was started
+this is approximately at `(Date.now() process.uptime() * 1000)`
+###
+
+now = require '../../lib/performance-now'
+console.log now().toFixed 3