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/.gometalinter.json

@@ -0,0 +1,3 @@
+{
+  "Enable": ["vet", "golint", "goimports", "deadcode", "gotype", "ineffassign", "misspell", "nakedret", "unconvert", "megacheck", "varcheck"]
+}