#44 添加视频录制支持

使用浏览器前端 API
支持 mjpeg 和 h.264 模式下的视频录制
录制格式为wbem（vp8）

web/share/i18n/i18n_en.json

@@ -109,6 +109,10 @@
     "kvm_text76":"Connect drive to Server",
     "kvm_text77":"Disconnect",
     "kvm_text78":"Reset",
+    "kvm_text79":"Video Record<br>",
+    "kvm_text80":"Record video using the browser API, and will be downloaded automatically",
+    "kvm_text81":"Start recording",
+    "kvm_text82":"End recording",
 
     "atx-ask-switch":"Ask click confirmation",
     "hid-recorder-loop-switch":"Infinite loop playback",

web/share/i18n/i18n_zh.json

@@ -109,6 +109,10 @@
     "kvm_text76":"连接 MSD 到主机",
     "kvm_text77":"断开连接",
     "kvm_text78":"重置",
+    "kvm_text79":"视频录制<br>",
+    "kvm_text80":"使用浏览器 API 录制视频（无音频），结束录制后视频文件会自动下载",
+    "kvm_text81":"开始录制",
+    "kvm_text82":"结束录制",
 
     "atx-ask-switch":"点击二次确认",
     "hid-recorder-loop-switch":"无限循环重放",