Notification 通知模块

对通知系统进行规范和统一管理，建立必要的接口

状态：快速开发中，不稳定

Name		Name	Last commit message	Last commit date
Latest commit History 75 Commits
notificationdelivery		notificationdelivery
notificationview		notificationview
.gitignore		.gitignore
LICENSE		LICENSE
checker.go		checker.go
condition.go		condition.go
content.go		content.go
content_test.go		content_test.go
errno.go		errno.go
error.go		error.go
error_test.go		error_test.go
filter.go		filter.go
filter_test.go		filter_test.go
header.go		header.go
header_test.go		header_test.go
notfication.go		notfication.go
notification_test.go		notification_test.go
readme.md		readme.md
sender.go		sender.go
store.go		store.go
store_test.go		store_test.go

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