[Openstreetmap] New osm-editor with empty-track bug removed and auto-centring

[nick at hogweed.org]

> Nick,
>
>  the gpsinput.h and gpsproj.h are missing in the
>  gpsbabel directory.

I deliberately removed those as they were causing problems of some sort. 
However the compilation on my system wasn't picking up the error as they were 
somewhere else. I have now commented out the includes for those files in 
gps.h and updated the repository, so the svn version should compile now.

> All gpx tracks should be loaded as "OSM" now ,
> otherwise
> the program writes
>
> WARNING: Empty TrackSeg
> No segments in track, so won't average
>
> even for the files from osm-editor repository.

What I'll probably do is deprecate and remove the old Save and Open, and 
replace the GPX files in the repository with some "OSM" format GPX files. 
"OSM" format GPX files by the way are files where each segment is represented 
as its own <trk> tag; before, there was only one <trk> tag per GPX file.

Thanks for the info,

Nick