Update scripts to the new sprite API
Update existings scripts to the new movement API
Merge branch 'master' into solarus-1.0.0

Conflicts:
	ChangeLog
	doc/Doxyfile
Update maps to the new syntax of destinations and teletransporters.
Update projects databases.
Replace sensors of type "return from bad ground" by usual ones.
Remove the subtype of sensors in existing maps.
Tilesets now have a string id.
Rename tileset ids.
Identify maps by strings too.
New tileset syntax in Lua. Easier to read, parse and maintain.
Lua tileset converter: I forgot the double quotes around the scrolling value.
Convert existing maps to the new Lua format.
Replace -1 by nil for savegame_variable of doors.
Add missing double-quotes to map properties.
Map data file syntax: represent the subtype of destructibles as strings.

Now the syntax is closer to the one of map:create_destructible_item().
Fix conveyor belt syntax (there is no size).
Subtypes are now strings and treasure_variant cannot be zero.
Updating existing map data files to new savegame values format.
Update map data files and scripts to the new savegame API.