Added better Tenanting

* Removed Tenanting from base objects as some models may be tenantless
* Admins are naturally not restricted by tenants
* Users *ARE* the tenants (for now) so they don't require a tenant ID
either
* User-owned models should all include the Tenanted model as their base
* Created .Create and .Save methods attached to base model

models/user.go

@@ -11,7 +11,7 @@ import (
 
 type User struct {
 	Auth
-	Email string `gorm:"unique" sql:"index"`
+	Email string `gorm:"unique;index"`
 }
 
 const userJwtDuration = time.Hour * 24
@@ -24,7 +24,6 @@ func (u *User) GetJwt() (string, int) {
 		"iat":  time.Now().Unix(),
 		"exp":  time.Now().Add(userJwtDuration).Unix(),
 		"role": "user",
-		"tid":  u.Tenant.String(),
 	})
 
 	jstr, err := j.SignedString(UserHmac)