Move a lot of stuff + tidy stuff (#37)

Lots of renaming and moving stuff, some bug fixes, more lenient parsing of notifications and home timeline.

internal/api/s2s/user/followers.go

@@ -25,6 +25,7 @@ import (
 	"github.com/sirupsen/logrus"
 )
 
+// FollowersGETHandler returns a collection of URIs for followers of the target user, formatted so that other AP servers can understand it.
 func (m *Module) FollowersGETHandler(c *gin.Context) {
 	l := m.log.WithFields(logrus.Fields{
 		"func": "FollowersGETHandler",