IoT-Dashboard v0.1.9

1. move custom script folder from the installation directory to the appdata
2. bundle the script helper scripts to eliminate the dependencies issues
3. fix auto updater notification modal display issue
4. move hightlight custom options to the settings in the appdata folder

IoT-Dashboard v0.1.8

1. add script editor
2. add unit tests for common.js
3. add embedded webview for auto test page
4. fix scrollbar unclickable issue
5. fix CRLF conversion issue

IoT-Dashboard v0.1.7

1. Upgrade electron-vue to fix differential download issue

IoT-Dashboard v0.1.6

1. 增加了update检测时间间隔，太短的间隔会把之前的update取消掉

IoT-Dashboard v0.1.5

1. 使用electron-settings持久化用户配置信息
2. 默认从github检查更新