Add array support for defauts

Based on:
https://uscilab.github.io/cereal/stl_support.html

To support vector we need to #include the cereal
vector header.

Closes #12

Tested-by: Was able to add an array default using
C++ vector syntax

Change-Id: I3b00c372b668ddcda69a56ede8edbc51ab2693f5
Signed-off-by: James Feist <james.feist@linux.intel.com>
diff --git a/settings_manager.mako.hpp b/settings_manager.mako.hpp
index 09a5a1f..c2255b8 100644
--- a/settings_manager.mako.hpp
+++ b/settings_manager.mako.hpp
@@ -34,6 +34,7 @@
     % endfor
 % endfor
 #include <cereal/archives/json.hpp>
+#include <cereal/types/vector.hpp>
 #include <fstream>
 #include <utility>
 #include <experimental/filesystem>