style(uoj/1/app): modify some page footer views

Add translations to some footer texts.
Open external links to the new blank view.

uoj/1/app/locale/basic/en.php

@@ -62,5 +62,7 @@ return [
 	'enter your QQ' => 'Enter your QQ',
 	'refuse to answer' => 'Refuse to answer',
 	'male' => 'Male',
-	'female' => 'Female'
+	'female' => 'Female',
+	'server time' => 'Server Time',
+	'opensource project' => 'OpenSource Project'
 ];

uoj/1/app/locale/basic/zh-cn.php

@@ -62,5 +62,7 @@ return [
 	'enter your QQ' => '输入QQ',
 	'refuse to answer' => '拒绝回答',
 	'male' => '男',
-	'female' => '女'
+	'female' => '女',
+	'server time' => '服务器时间',
+	'opensource project' => '开源项目'
 ];

uoj/1/app/views/page-footer.php

@@ -14,11 +14,11 @@
 				<ul class="list-inline">
 					<li><?= UOJConfig::$data['profile']['oj-name'] ?></li>
 					<?php if (UOJConfig::$data['profile']['ICP-license'] != ''): ?> | 
-					<li><a href="http://www.miitbeian.gov.cn"><?= UOJConfig::$data['profile']['ICP-license'] ?></a></li>
+					<li><a href="http://www.miitbeian.gov.cn" target="_blank"><?= UOJConfig::$data['profile']['ICP-license'] ?></a></li>
 					<?php endif ?>
 				</ul>
 				
-				<p>Server time: <?= UOJTime::$time_now_str ?> | <a href="http://github.com/UniversalOJ/UOJ-System">开源项目</a></p>
+				<p><?= UOJLocale::get('server time') ?>: <?= UOJTime::$time_now_str ?> | <a href="http://github.com/UniversalOJ/UOJ-System" target="_blank"><?= UOJLocale::get('opensource project') ?></a></p>
 			</div>
 			<?php endif ?>
 		</div>