Merge branch 'master' into libchamplain-0-12

gnome-ostree does builds directly from git with srcdir != builddir.
Thus champlain-version.h will be in $(builddir); we should not
explicitly prefix it with $(srcdir).

Omit it from enum and introspection scanning too.

Jonas Danielsson authored Aug 19, 2013 and Jiří Techet committed Aug 21, 2013

https://bugzilla.gnome.org/show_bug.cgi?id=706282

Add a function to access the list of overlay sources, emit the "map-source"
signal when overlay sources changed and update the license actor with
all the overlay source licenses.

Map source can be changed before the idle is executed so we should check
whether to load the given tile or not.

Giovanni Campagna authored Aug 16, 2013 and Jiří Techet committed Aug 19, 2013

Allow to add overlay sources in the demo app.

https://bugzilla.gnome.org/show_bug.cgi?id=704645

Giovanni Campagna authored Jul 21, 2013 and Jiří Techet committed Aug 19, 2013

OWM are layers to be rendered on top of an existing map, and
the simplest way to achieve that is to have ChamplainView render
maps from a list of sources.

https://bugzilla.gnome.org/show_bug.cgi?id=704645

Giovanni Campagna authored Jul 21, 2013 and Jiří Techet committed Aug 19, 2013

OpenWeatherMaps provides free (CC-BY-SA 2.0) maps for various
kind of weather data, such as clouds, wind, temperature and
precipitation.

This is not fully functional because OWM maps are just layers,
intended to be placed above OpenStreetMaps.

https://bugzilla.gnome.org/show_bug.cgi?id=704645

Marvin Schmidt authored Aug 14, 2013 and Jiří Techet committed Aug 14, 2013

This will avoid file collisions with future API versions and makes
different API versions completely parallel installable

Jonas Danielsson authored Aug 12, 2013 and Zeeshan Ali committed Aug 13, 2013

https://bugzilla.gnome.org/show_bug.cgi?id=705829

Move tile creation, addition to the viewport and positioning into
idle functions to perform smaller amount of work in the load_visible_tiles()
method which leads to smoother animation because tile loading is better
interleaved with the panning animation.

Conflicts:
	configure.ac

Conflicts:
	NEWS

This reverts commit 5fbcda5c. After a second
thought it's not a good idea to change the API by removing the define.
Let's remove the define next time we make an API bump.

Conflicts:
	champlain/champlain-0.12.vapi

Osmarender doesn't exist any more and will be removed completely in the
future version of libchamplain.

Also improve scrolling event handling slightly