Add experimental map with all st+fl+it

to allow players and level builders
to explore the interactions between all of them.

Signed-off-by: Bernhard M. Wiedemann <bwiedemann@suse.de>
Co-Authored-by: Tobias Wiedemann <tobias zq1.de>

Author: bmwiedemann

data/levels/enigma_experimental/index.xml

@@ -9,7 +9,7 @@
     <level _seq="1" _title="Demo Simple" _xpath="./demo_simple" author="Ronald Lamprecht" ctrl="force" easy="false" id="20060210ral001" rel="1" rev="2" score="1" target="time" unit="duration"/>
     <level _seq="2" _title="Demo I18N" _xpath="./demo_i18n" author="Ronald Lamprecht" ctrl="force" easy="false" id="20060211ral002" rel="1" rev="2" score="1" target="time" unit="duration"/>
     <level _seq="3" _title="New API level template" _xpath="./level_template" author="AUTHOR" ctrl="force" easy="false" id="level_template" rel="1" rev="1" score="1" target="time" unit="duration"/>
-    <level _seq="4" _title="All Stones as of Enigma 1.20" _xpath="./stones_1" author="Raoul Bourquin" ctrl="force" easy="false" id="stones" rel="1" rev="3" score="1" target="time" unit="duration"/>
+    <level _seq="4" _title="All Stones+Floors+Items as of Enigma 1.20" _xpath="./stones_1" author="Raoul Bourquin" ctrl="force" easy="false" id="stones" rel="1" rev="3" score="1" target="time" unit="duration"/>
     <level _seq="5" _title="All Floors as of Enigma 1.20" _xpath="./floors_1" author="Raoul Bourquin" ctrl="force" easy="false" id="floors" rel="1" rev="5" score="1" target="time" unit="duration"/>
     <level _seq="6" _title="All Items as of Enigma 1.20" _xpath="./items_1" author="Raoul Bourquin" ctrl="force" easy="false" id="items" rel="1" rev="3" score="1" target="time" unit="duration"/>
     <level _seq="7" _title="Selfsolving: Screen Flipping" _xpath="./selfsolving_screenflipping" author="Andreas Lochmann" ctrl="force" easy="false" id="selfsolving_flipping" rel="1" rev="1" score="1" target="time" unit="duration"/>