Added new response

OTA-Server.md

@@ -26,6 +26,13 @@ example.com/otaDescriptor
 
 This should return last 10 commits of every user (as no user was specified)
 ```
+
+```
+example.com/otaDescriptor?branches
+
+This should return an array of branch names
+```
+
 ## Responses
 
 Example response (/otaDescriptor?username=foo):
@@ -71,3 +78,11 @@ Example response (/otaDescriptor?username=foo&branch=master):
    "currentVersionHasOta":true
 }
 ```
+
+Example response (/otaDescriptor?branches)
+```json
+[
+   "master",
+   "feature-1"
+]
+```