Init V4 community edition (#2265)

* Init V4 community edition

* Init V4 community edition

application/migrator/model/webdav.go

@@ -0,0 +1,16 @@
+package model
+
+import (
+	"github.com/jinzhu/gorm"
+)
+
+// Webdav 应用账户
+type Webdav struct {
+	gorm.Model
+	Name     string // 应用名称
+	Password string `gorm:"unique_index:password_only_on"` // 应用密码
+	UserID   uint   `gorm:"unique_index:password_only_on"` // 用户ID
+	Root     string `gorm:"type:text"`                     // 根目录
+	Readonly bool   `gorm:"type:bool"`                     // 是否只读
+	UseProxy bool   `gorm:"type:bool"`                     // 是否进行反代
+}