added margin and padding support, some fixes: yoga needs many values to be initialized properly

engine/shape.hpp

@@ -6,7 +6,8 @@ namespace att
         Width, MinWidth, MaxWidth,
         Height, MinHeight, MaxHeight, 
         Divisions, InnerRadius, OuterRadius,
-        Grow, Shrink, FlexDir, FlexWrap
+        Grow, Shrink, FlexDir, FlexWrap, 
+        Padding, Margin
     };
 
     struct AttributeBase 
@@ -45,6 +46,8 @@ namespace att
         { "shrink", kAttribute::Shrink },
         { "dir", kAttribute::FlexDir },
         { "wrap", kAttribute::FlexWrap },
+        { "pad", kAttribute::Padding },
+        { "margin", kAttribute::Margin},
     };
     constexpr int map_size = sizeof(map) / sizeof(typemap) - 1;
     constexpr bool same(const char* a, const char* b)
@@ -83,6 +86,8 @@ namespace att
     DECLARE_ATTRIBUTE(Shrink, float);
     DECLARE_ATTRIBUTE(FlexDir, int);
     DECLARE_ATTRIBUTE(FlexWrap, int);
+    DECLARE_ATTRIBUTE(Padding, glm::vec4);
+    DECLARE_ATTRIBUTE(Margin, glm::vec4);
 
 #undef DECLARE_ATTRIBUTE
 }