Add note that this is a fork of maemo-mapper and original copyrights.

Add my own copyright.
Add some quick documentation on how to import osm data.

diff --git a/README b/README
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--- a/README
+++ b/README
@@ -1 +1,41 @@
 Mapper
+------
+Mapper is a fork of maemo-mapper, with emphasis 
+on using and creating OpenStreetMap data.
+
+Original maemo-mapper Copyright (C) 2006-2007 John Costigan.
+POI and GPS-Info code originally written by Cezary Jackiewicz.
+All code after fork Copyright (C) 2007 Kaj-Michael Lang
+
+Major changes made:
+* Splitting of source code
+* Supports running on plain gtk+ and maemo
+* Use OSM data for location information
+* ...
+
+Building
+--------
+./autogen.sh
+./configure && make && make install
+
+How to use OSM data
+-------------------
+Right now this needs some manual work.
+
+1. First create a sqlite3 database with tables:
+
+       sqlite3 osm-planet.db < docs/osm-tables.sql
+       sqlite3 osm-planet.db < docs/osm-indexes.sql
+
+2. Then import data from planet.osm (or from a .osm file saved from JOSM)
+       Run:
+       osm2db planet.osm
+
+       The full planet database can be quite large so 
+       you can limit the import to a box.
+       This require 4 parameters, min lat/lon and max lat/lon:
+
+       osm2db planet.osm 60.0 18.0 70.0 33.0
+
+3. Start mapper and configure the database path so it points the file just created.
+