Merge branch 'master' of https://github.com/b3log/wide

i18n/en_US.json

@@ -139,5 +139,9 @@
     "import": "Import",
     "theme": "Theme",
     "tab_size": "Tab Size",
-    "copy_file_path": "Copy File Path"
+    "copy_file_path": "Copy File Path",
+    "file_tree": "File Tree",
+    "select": "Select",
+    "expand": "Expand",
+    "collapse": "Collapse"
 }

i18n/ja_JP.json

@@ -139,5 +139,9 @@
     "import": "インポート",
     "theme": "テーマ",
     "tab_size": "Tab·サイズ",
-    "copy_file_path": "ファイルパスをコピー"
+    "copy_file_path": "ファイルパスをコピー",
+    "file_tree": "ファイルツリー",
+    "select": "選択する",
+    "expand": "展開する",
+    "collapse": "シャットダウン"
 }

i18n/zh_CN.json

@@ -139,5 +139,9 @@
     "import": "导入",
     "theme": "主题",
     "tab_size": "Tab 大小",
-    "copy_file_path": "复制文件路径"
+    "copy_file_path": "复制文件路径",
+    "file_tree": "文件树",
+    "select": "选择",
+    "expand": "展开",
+    "collapse": "收起"
 }

i18n/zh_TW.json

@@ -139,5 +139,9 @@
     "import": "導入",
     "theme": "主題",
     "tab_size": "Tab 大小",
-    "copy_file_path": "複製文件路徑"
+    "copy_file_path": "複製文件路徑",
+    "file_tree": "文件樹",
+    "select": "選擇",
+    "expand": "展開",
+    "collapse": "收起"
 }

views/keyboard_shortcuts.html

@@ -51,5 +51,11 @@
             <li>F6{{.i18n.colon}}{{.i18n.build_n_run}}</li>
             <li>Ctrl-C{{.i18n.colon}}{{.i18n.clearOutput}}</li>
         </ul>
+        <h2>{{.i18n.file_tree}}</h2>
+        <ul>
+            <li>Up/Down{{.i18n.colon}}{{.i18n.select}}</li>
+            <li>Left/Right{{.i18n.colon}}{{.i18n.collapse}}/{{.i18n.expand}}</li>
+            <li>Ctrl-R{{.i18n.colon}}{{.i18n.rename}}</li>
+        </ul>
     </body>
 </html>