add models

src/myaktion/model/account.go

+package model
+
+type Account struct {
+	Name     string
+	BankName string
+	Number   string
+}

src/myaktion/model/campaign.go

+package model
+
+type Campaign struct {
+	Name                string
+	OrganizerName       string
+	TargetAmmount       float64
+	DonationMinimum     float64
+	AmmountDonatedSoFar float64
+	Donations           []Donation
+	Account
+}

src/myaktion/model/donation.go

+package model
+
+type Donation struct {
+	Ammount          float64
+	DonorName        string
+	ReceiptRequested bool
+	Campaign
+}
+
+type Status string
+
+const (
+	TRANSFERRED Status = "TRANSFERRD"
+	In_PROCESS  Status = "IN PROCESS"
+)