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/ActivityCollection.go

@@ -0,0 +1,7 @@
+package models
+
+type Collection struct {
+	Id         string `gorm:"primarykey"`
+	TargetId   string
+	TargetType uint32
+}