Removed broken method for accessing old versions

The old method of accessing versions is broken and unlikely to every be
updated or maintained, removed it in favor of the new module __call__
interface and update the example.py to reflect the change.

Author: nickelpro

example.py

@@ -1,31 +1,13 @@
-from minecraft_data.v1_8 import find_item_or_block
-
-print(find_item_or_block(1))
-
-print(find_item_or_block("stone"))
-
-from minecraft_data.v1_8 import recipes
-
-print(recipes["5"][0])
-
-from minecraft_data.v1_8 import windows as windows
-
-print(windows["minecraft:brewing_stand"])
-
-from minecraft_data.v1_9 import recipes as recipes2
-
-print(recipes2["5"][0])
-
-
-from minecraft_data.v1_8 import effects_name
-
-print(effects_name["Haste"])
+import minecraft_data
+mcd = minecraft_data("1.13.2")
 
+print(mcd.version)
 
-from minecraft_data.v1_8 import version
+print(mcd.find_item_or_block(1))
+print(mcd.find_item_or_block('stone'))
 
-print(version)
+print(mcd.recipes['5'][0])
 
-import minecraft_data
+print(mcd.windows['minecraft:brewing_stand'])
 
-print(minecraft_data("1.12").version)
+print(mcd.effects_name['Haste'])