refactored dtoextensions
cleanuped dto code
added GetCountByDate and GetRateCounts APIs
installed highcharts nuget package
添加：维修人员页面的打印功能
updated logging
renamed a folder
修复：打印标题居中，班级表格错行
updated GetByDate apis
增加：报表统计图
Merge pull request #83 from Zjazure/release-candidate

阶段更新 - 故障类型分类编码前更新合并