Use apiextension v1

- upgrade from apiextension v1beta1 to v1
 - generate yaml manifest for crd intead of applying it at runtime
  - users will have to apply the manifest with kubectl
 - kg and kgctl log an error if the crd is not present
 - now validation should actually work

Signed-off-by: leonnicolas <leonloechner@gmx.de>

vendor/github.com/gobuffalo/flect/dasherize.go

@@ -0,0 +1,34 @@
+package flect
+
+import (
+	"strings"
+	"unicode"
+)
+
+// Dasherize returns an alphanumeric, lowercased, dashed string
+//	Donald E. Knuth = donald-e-knuth
+//	Test with + sign = test-with-sign
+//	admin/WidgetID = admin-widget-id
+func Dasherize(s string) string {
+	return New(s).Dasherize().String()
+}
+
+// Dasherize returns an alphanumeric, lowercased, dashed string
+//	Donald E. Knuth = donald-e-knuth
+//	Test with + sign = test-with-sign
+//	admin/WidgetID = admin-widget-id
+func (i Ident) Dasherize() Ident {
+	var parts []string
+
+	for _, part := range i.Parts {
+		var x string
+		for _, c := range part {
+			if unicode.IsLetter(c) || unicode.IsDigit(c) {
+				x += string(c)
+			}
+		}
+		parts = xappend(parts, x)
+	}
+
+	return New(strings.ToLower(strings.Join(parts, "-")))
+}