adding file "How_to_translate_GUI.sxw" which explains GUI translation and kicad code optional changes

* crash when creating a sheet that does not yet have a sch file
* when loading schematic file v 1 annotations are applied to all sheets independent of path in hierarchy
* component reference is drawn by default upon placing a new libary comp. 

counterparts, will be connected together if they have the same label (name) and are on the same sheet. 

  Added item "Delete" in "Edit" menu.
  Added menu "Place" with all possible 
elements from the right toolbar.