New stone stair arches

git-svn-id: svn+ssh://svn.code.sf.net/p/crossfire/code/trunk/arch@3087 282e977c-c81d-0410-88c4-b93c2d0d6712

exit/Up_down/stair3_gstone_do.arc

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+Object stair3_gstone_do
+name stairs going down
+face stair3_gstone_do.111
+type 66
+no_pick 1
+editable 2
+visibility 100
+magicmap brown
+end

exit/Up_down/stair3_gstone_up.arc

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+Object stair3_gstone_up
+name stairs going up
+face stair3_gstone_up.111
+type 66
+no_pick 1
+editable 2
+visibility 100
+magicmap brown
+end

exit/Up_down/stair3_ystone_do.arc

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+Object stair3_ystone_do
+name stairs going down
+face stair3_ystone_do.111
+type 66
+no_pick 1
+editable 2
+visibility 100
+magicmap brown
+end

exit/Up_down/stair3_ystone_up.arc

@@ -0,0 +1,9 @@
+Object stair3_ystone_up
+name stairs going up
+face stair3_ystone_up.111
+type 66
+no_pick 1
+editable 2
+visibility 100
+magicmap brown
+end