fix docs

Author: solverat

docs/01_BackendUsage.md

@@ -6,13 +6,13 @@ It's possible to group your forms in order keep your form organized.
 Just define a group name per form and you'll get a folder-organized tree view.
 
 ## Meta Information
-<img src="https://user-images.githubusercontent.com/700119/48311937-8ba5d400-e5a7-11e8-9e55-a7807aecd730.png">
+![image](https://user-images.githubusercontent.com/700119/48311937-8ba5d400-e5a7-11e8-9e55-a7807aecd730.png)
 There are some meta information about each form you've created. Just click the blue "Info"-Button in the `Base` Section.
 
-| Name | Description |
-|------|-------------|
-| Creation Date | -- |
-| Modification Date | -- |
-| User Owner| -- |
-| User Modification | -- |
-| Required By | List all Documents which are using the current form |
+| Name              | Description                                         |
+|-------------------|-----------------------------------------------------|
+| Creation Date     | --                                                  |
+| Modification Date | --                                                  |
+| User Owner        | --                                                  |
+| User Modification | --                                                  |
+| Required By       | List all Documents which are using the current form |