Comments and missing forward declaration

imgui.h

@@ -41,6 +41,7 @@ struct ImDrawList;
 struct ImDrawData;
 struct ImFont;
 struct ImFontAtlas;
+struct ImColor;
 struct ImGuiIO;
 struct ImGuiStorage;
 struct ImGuiStyle;
@@ -257,7 +258,7 @@ namespace ImGui
     IMGUI_API bool          ColorButton(const ImVec4& col, bool small_height = false, bool outline_border = true);
     IMGUI_API bool          ColorEdit3(const char* label, float col[3]);
     IMGUI_API bool          ColorEdit4(const char* label, float col[4], bool show_alpha = true);
-    IMGUI_API void          ColorEditMode(ImGuiColorEditMode mode);
+    IMGUI_API void          ColorEditMode(ImGuiColorEditMode mode);                                 // FIXME-OBSOLETE: This is inconsistent with most of the API and should be obsoleted.
     IMGUI_API void          PlotLines(const char* label, const float* values, int values_count, int values_offset = 0, const char* overlay_text = NULL, float scale_min = FLT_MAX, float scale_max = FLT_MAX, ImVec2 graph_size = ImVec2(0,0), int stride = sizeof(float));
     IMGUI_API void          PlotLines(const char* label, float (*values_getter)(void* data, int idx), void* data, int values_count, int values_offset = 0, const char* overlay_text = NULL, float scale_min = FLT_MAX, float scale_max = FLT_MAX, ImVec2 graph_size = ImVec2(0,0));
     IMGUI_API void          PlotHistogram(const char* label, const float* values, int values_count, int values_offset = 0, const char* overlay_text = NULL, float scale_min = FLT_MAX, float scale_max = FLT_MAX, ImVec2 graph_size = ImVec2(0,0), int stride = sizeof(float));