added livechat branding

packages/rocketchat-livechat/app/client/stylesheets/_variables.less

 @header-min-height: 30px;
-@footer-min-height: 42px;
+@footer-min-height: 55px;
 
 @rooms-box-width: 260px;
 @flex-tab-width: 400px;

packages/rocketchat-livechat/app/client/stylesheets/main.less

@@ -363,7 +363,7 @@ input:focus {
 		border-right: 1px solid #E7E7E7;
 
 		.input-wrapper {
-			padding: 6px;
+			padding: 6px 6px 0 6px;
 			textarea {
 				display: block;
 				padding: 6px 8px;
@@ -483,6 +483,31 @@ input:focus {
 	}
 }
 
+.powered-by {
+	text-align: right;
+	font-size: 0.65rem;
+	height: 20px;
+	line-height: 20px;
+	color: #666;
+	padding: 0 1em;
+	opacity: 0.5;
+
+	.transition(opacity .15s ease-out);
+
+	&:hover {
+		opacity: 1;
+	}
+
+	a {
+		text-decoration: none;
+		margin-left: 1px;
+		img {
+			height: 14px;
+			vertical-align: middle;
+		}
+	}
+}
+
 @media all and(max-height: 200px) {
 	.livechat-room {
 		.title {

packages/rocketchat-livechat/app/client/views/messages.html

@@ -19,5 +19,11 @@
 		<div class="input-wrapper">
 			<textarea class="input-message" placeholder="Type your message"></textarea>
 		</div>
+		<p class="powered-by">
+			Powered by
+			<a href="https://rocket.chat" target="_blank">
+				<img class="logo" src="/logo-dark.svg?v=1">
+			</a>
+		</p>
 	</div>
 </template>

packages/rocketchat-livechat/app/public/logo-dark.svg

+<?xml version="1.0" encoding="utf-8"?>
+<!-- Generator: Adobe Illustrator 16.0.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<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"
+	 width="435.721px" height="85.242px" viewBox="62.402 -18.766 435.721 85.242"
+	 enable-background="new 62.402 -18.766 435.721 85.242" xml:space="preserve">
+<g>
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