Add vk bridge (#1372)

* Add vk bridge

* Vk bridge attachments

* Vk bridge forwarded messages

* Vk bridge sample config and code cleanup

* Vk bridge add vendor

* Vk bridge message edit

* Vk bridge: fix fetching names of other bots

* Vk bridge: code cleanup

* Vk bridge: fix shadows declaration

* Vk bridge: remove UseFileURL

vendor/github.com/SevereCloud/vksdk/v2/api/storage.go

@@ -0,0 +1,48 @@
+package api // import "github.com/SevereCloud/vksdk/v2/api"
+
+import (
+	"github.com/SevereCloud/vksdk/v2/object"
+)
+
+// StorageGetResponse struct.
+type StorageGetResponse []object.BaseRequestParam
+
+// ToMap return map from StorageGetResponse.
+func (s StorageGetResponse) ToMap() map[string]string {
+	m := make(map[string]string)
+	for _, item := range s {
+		m[item.Key] = item.Value
+	}
+
+	return m
+}
+
+// StorageGet returns a value of variable with the name set by key parameter.
+//
+// StorageGet always return array!
+//
+// https://vk.com/dev/storage.get
+func (vk *VK) StorageGet(params Params) (response StorageGetResponse, err error) {
+	err = vk.RequestUnmarshal("storage.get", &response, params)
+
+	return
+}
+
+// StorageGetKeysResponse struct.
+type StorageGetKeysResponse []string
+
+// StorageGetKeys returns the names of all variables.
+//
+// https://vk.com/dev/storage.getKeys
+func (vk *VK) StorageGetKeys(params Params) (response StorageGetKeysResponse, err error) {
+	err = vk.RequestUnmarshal("storage.getKeys", &response, params)
+	return
+}
+
+// StorageSet saves a value of variable with the name set by key parameter.
+//
+// https://vk.com/dev/storage.set
+func (vk *VK) StorageSet(params Params) (response int, err error) {
+	err = vk.RequestUnmarshal("storage.set", &response, params)
+	return
+}