disable check for modifier keys when a mouse click is recieved
unify signal name; change changed to point-changed
add user data field and get/set functions to OsmGpsMapPoint
initialize OsmGpsMapPoint user data field to NULL
add function to zoom and center map to to fit two given points
change drag and drop to the right mouse button
add clickable property to OsmGpsMapTrack
add point-selected signal to OsmGpsMapTrack
make tracks with property clickable clickable with the left mouse button
add clickable_track example to give a simple idea of the use of clickable/selectable points
add little comment about a property
make the breakable habbit optional, controlled by the breakable property
Add breakable example, this has the abilities that the old editable_track example had. Now the editable_track example only shows the ability to edit/move points and this example now has also the ability to add points in between.
Merge branches 'point-userdata', 'zoom2fit', 'selectable' and 'breakable'

Conflicts:
	examples/Makefile.am
	src/osm-gps-map-track.c
	src/osm-gps-map-widget.c
Update file m4/gtk-doc.m4, dont know what this is or does. This changes keep comming up after running ./autogen.sh