Added the better_code_samples plugin.

.gitmodules

@@ -7,3 +7,6 @@
 [submodule "cjk-auto-spacing"]
 	path = cjk-auto-spacing
 	url = https://github.com/yuex/cjk-auto-spacing.git
+[submodule "better_code_samples"]
+	path = better_code_samples
+	url = git@github.com:ChrislS/better_code_samples.git

better_code_samples

@@ -0,0 +1 @@
+Subproject commit 91717a204bbd0ae4a1af6fe25ac5dd783fb4a7db