Merge pull request #182 from kinichiro/fix_pcbnew

fix pcbnew, footprint editor section and description about keep out area

src/pcbnew/pcbnew_creating_editing_footprints.adoc

@@ -167,8 +167,8 @@ image:images/icons/new_footprint.png[]. The name of the new footprint
 will be requested. This will be the name by which the footprint will be
 identified in the library.
 
-This text also serves as the footprint reference, which is ultimately
-replaced by the real reference (U1, IC3...).
+This text also serves as the footprint value, which is ultimately
+replaced by the real value (100uF_16V, 100_0.5W, ...).
 
 The new footprint will require:
 
@@ -185,7 +185,7 @@ footprint is as follows:
 * Load the similar footprint (image:images/icons/load_module_lib.png[],
   image:images/icons/load_module_board.png[] or
   image:images/icons/import_module.png[]).
-* Modify the reference field in order to generate a new identifier (name).
+* Modify the "Footprint Name in Library" field in order to generate a new identifier (name).
 * Edit and save the new footprint.
 
 === Adding and editing pads

src/pcbnew/pcbnew_general_operations.adoc

@@ -405,7 +405,7 @@ shown in Pcbnew:
 | image:images/icons/add_keepout_area.png[]
     | Placement of keepout areas ( on copper layers ).
 | image:images/icons/auto_track_width.png[]
-    | Keepout are areas with no tracks, or/and vias or/and copper areas
+    | Auto track width: when starting on an existing track use its width otherwise, use current width setting.
 | image:images/icons/add_line.png[]
     | Draw Lines on technical layers (i.e. not a copper layer).
 | image:images/icons/add_circle.png[]