doc/manual: Merge updated pages subtree

Author: dg0yt

doc/manual/pages/file_menu.md

@@ -50,6 +50,8 @@ Permits the import of maps or data in other formats. Currently the following for
 
 Permits the export of the currently opened map to another format. Currently pdf and raster image export are supported.
 
+For raster images, Mapper may additionally create world files. A world file is a small text file which defines the image's georeferencing relative to the map's projected coordinate reference system. Note that these files contain only six numerical parameters. They do not contain an identification of the projection, coordinate system or datum they refer to. The filename is derived from the image's filename, but with a modified filename extension usually ending with letter 'w'.
+
 
 ---
 

doc/manual/pages/find_objects.md

@@ -37,7 +37,7 @@ The following expressions are supported:
 | expr1 OR expr2  | matching expression expr1 or expr2 (or both) |
 | key = value | having a tag with the given key and value |
 | key ~= word | having a tag with the given key and a value containing "word" |
-| key != word | having a tag with the given key and a value different from "word" |
+| key != word | having a tag with the given key and a value different from "word", or not having a tag with this key |
 
 AND has precedence over OR. You may use parentheses to nest operators in another way.
 
@@ -58,7 +58,7 @@ The "Query editor" button will replace the input field with a table for entering
 Pressing the button again will restore the input field and make it show the query from editor view.
 
 
-## Query editor
+## Query editor  {#query-editor}
 
 ![Query editor](images/query_editor.png)