Add Braintree payment processor

src/apps.json

@@ -6344,6 +6344,14 @@
 			"script": "paths(?:\\.min)?\\.js",
 			"website": "http://github.com/andreaferretti/paths-js"
 		},
+		"Braintree": {
+			"cats": [
+				"41"
+			],
+			"env": "^braintree$",
+			"icon": "Braintree.svg",
+			"website": "https://www.braintreepayments.com"
+		},
 		"PayPal": {
 			"cats": [
 				"41"

src/icons/Braintree.svg

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+	 viewBox="0 0 160 160" style="enable-background:new 0 0 160 160;" xml:space="preserve">
+<style type="text/css">
+	.st0{fill:#1C1C1C;}
+</style>
+<path class="st0" d="M45.8,122.9v-12.8h10.1V47.8H45.8V35h40.7c18.6,0,30.1,8.7,30.1,23.7c0,9.9-5.8,15.9-13,18.8
+	c10.5,2.9,18,10.3,18,20.4c0,16.1-12.4,25-32.8,25H45.8z M69.7,47.8v23.9h15.1c11.4,0,17.3-4.3,17.3-12c0-7.8-6-12-17.5-12
+	C84.6,47.8,69.7,47.8,69.7,47.8z M69.7,109.9h17.3c13.4,0,20-4.3,20-12.8c0-8.3-7.2-12.8-21.1-12.8H69.7
+	C69.7,84.3,69.7,109.9,69.7,109.9z"/>
+</svg>