gets latest updates (adds MNIST data) from aima-data submodule

SnShine · SnShine · commit 195e388a2948 · 2016-07-12T20:07:39.000+05:30
diff --git a/aima-data b/aima-data
@@ -1 +1 @@
-Subproject commit 1ad2ae2d378f658d8f0ff8f4d2202b66b675397f
+Subproject commit a21fc108f52ad551344e947b0eb97df82f8d2b2b
