Lots of progress on public AP interface

- Read handler for create activities (notes only so far)
- Read handler for note objects
- Structure laid out for other objects, activities and collections
- DB structure for activities created
- Update access logging

TODO: Create collections type in DB to describe a collection group

storage-new/models/ActivitystreamsActivityToObject.go

@@ -1,6 +1,7 @@
 package models
 
 type ActivitystreamsActivity struct {
+	Id         string `gorm:"primarykey"`
 	Type       string `gorm:"type:activitystreams_activity_type"`
 	ObjectId   string
 	ObjectType uint32 // Target type: ActivitystreamsActivityTargetType