v.info: Rename location to project in outputs (#3133)

- Translatable plain text output now generates "Project" instead of "Location".
- Extended shell-style output now generates "project=" in addtion to "location=".
- Examples in documentation now show project only.
- History continues using LOCATION because history file is printed as is and the parsing rules applied to it are unclear, so consequences of adding a new key there are not clear to me.

vector/v.info/print.c

@@ -200,6 +200,7 @@ void print_shell(struct Map_info *Map, const char *field_opt)
     fprintf(stdout, "name=%s\n", Vect_get_name(Map));
     fprintf(stdout, "mapset=%s\n", Vect_get_mapset(Map));
     fprintf(stdout, "location=%s\n", G_location());
+    fprintf(stdout, "project=%s\n", G_location());
     fprintf(stdout, "database=%s\n", G_gisdbase());
     fprintf(stdout, "title=%s\n", Vect_get_map_name(Map));
     fprintf(stdout, "scale=1:%d\n", Vect_get_scale(Map));
@@ -302,7 +303,7 @@ void print_info(struct Map_info *Map)
     G_saprintf(line, "%-17s%s", _("Mapset:"), Vect_get_mapset(Map));
     printline(line);
 
-    G_saprintf(line, "%-17s%s", _("Location:"), G_location());
+    G_saprintf(line, "%-17s%s", _("Project:"), G_location());
     printline(line);
     G_saprintf(line, "%-17s%s", _("Database:"), G_gisdbase());
     printline(line);

vector/v.info/v.info.html

@@ -23,7 +23,7 @@ <h3>Basic metadata information</h3>
  +----------------------------------------------------------------------------+
  | Name:            geology                                                   |
  | Mapset:          PERMANENT                                                 |
- | Location:        nc_spm_08                                                 |
+ | Project:         nc_spm_08                                                 |
  | Database:        /home/martin/grassdata                                    |
  | Title:           North Carolina geology map (polygon map)                  |
  | Map scale:       1:1                                                       |
@@ -68,6 +68,10 @@ <h3>Map history</h3>
 ---------------------------------------------------------------------------------
 </pre></div>
 
+Note that while "project" is used by <em>v.info</em> elsewhere, history output
+uses the legacy term "location" because "LOCATION" is currently a part of the
+native vector format.
+
 <h3>Attribute columns for given layer</h3>
 
 <div class="code"><pre>
@@ -91,7 +95,7 @@ <h3>Basic metadata information in shell script style</h3>
 
 name=geology
 mapset=PERMANENT
-location=nc_spm_08
+project=nc_spm_08
 database=/home/martin/grassdata
 title=North Carolina geology map (polygon map)
 scale=1:1