moved solution to exemplar.jl

Author: Colin Leach

exercises/concept/chessboard/.meta/exemplar.jl

@@ -0,0 +1,7 @@
+rank_range() = 1:8
+
+file_range() = 'A':'H'
+
+ranks() = collect(rank_range())
+
+files() = collect(file_range())

exercises/concept/chessboard/chessboard.jl

@@ -1,8 +1,11 @@
+function rank_range() 
+end
 
-rank_range() = 1:8
+function file_range()
+end
 
-file_range() = 'A':'H'
+function ranks()
+end
 
-ranks() = collect(rank_range())
-
-files() = collect(file_range())
+function files()
+end