Initial check-in of chaiscript_extras with std::floor support

Author: lefticus

README.md

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+In this repository will live user contributed wrappers
+for ChaiScript.
+
+

include/chaiscript/extras/math.hpp

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+#include <cmath>
+
+namespace chaiscript {
+  namespace extras {
+    namespace math {
+      template<typename Ret, typename Param>
+      ModulePtr floor(ModulePtr m = std::make_shared<Module>())
+      {
+        // using the overloads provided by C++11
+        // http://www.cplusplus.com/reference/cmath/floor/
+        m->add(chaiscript::fun(static_cast<Ret (Param)>(&std::floor)), "floor");
+        return m;
+      }
+
+      ModulePtr bootstrap(const std::string &type, ModulePtr m = std::make_shared<Module>())
+      {
+        floor<double, double>(m);
+        floor<long double, long double>(m);
+        floor<float, float>(m);
+
+        return m;
+      }
+    }
+  }
+}