Normalize namespaces: includes all at global/root namespace.

Should improve the quality of suggestions, etc. we get from tooling.

src/platform/gui.h

@@ -7,6 +7,7 @@
 #ifndef SOLVESPACE_GUI_H
 #define SOLVESPACE_GUI_H
 
+namespace SolveSpace {
 class RgbaColor;
 
 namespace Platform {
@@ -386,5 +387,6 @@ void ExitGui();
 void ClearGui();
 
 }
+} // namespace SolveSpace
 
 #endif

src/platform/platform.h

@@ -7,6 +7,7 @@
 #ifndef SOLVESPACE_PLATFORM_H
 #define SOLVESPACE_PLATFORM_H
 
+namespace SolveSpace {
 namespace Platform {
 
 // UTF-8 ⟷ UTF-16 conversion, for Windows.
@@ -80,6 +81,7 @@ void DebugPrint(const char *fmt, ...);
 void *AllocTemporary(size_t size);
 void FreeAllTemporary();
 
-}
+} // namespace Platform
+} // namespace SolveSpace
 
 #endif

src/resource.h

@@ -7,11 +7,23 @@
 #ifndef SOLVESPACE_RESOURCE_H
 #define SOLVESPACE_RESOURCE_H
 
+#include <functional>
+#include <map>
+#include <memory>
+#include <stdint.h>
+#include <string>
+#include <vector>
+
+namespace SolveSpace {
+
 class Camera;
 class Point2d;
 class Pixmap;
 class Vector;
 class RgbaColor;
+namespace Platform {
+    class Path;
+} // namespace Platform
 
 std::string LoadString(const std::string &name);
 std::string LoadStringFromGzip(const std::string &name);
@@ -109,4 +121,5 @@ public:
                const std::function<void(Vector, Vector)> &traceEdge, const Camera &camera);
 };
 
+}
 #endif

src/solvespace.h

@@ -7,6 +7,10 @@
 #ifndef SOLVESPACE_H
 #define SOLVESPACE_H
 
+#include "resource.h"
+#include "platform/platform.h"
+#include "platform/gui.h"
+
 #include <cctype>
 #include <climits>
 #include <cmath>
@@ -122,9 +126,6 @@ static constexpr double LENGTH_EPS    =  1e-6;
 static constexpr double VERY_POSITIVE =  1e10;
 static constexpr double VERY_NEGATIVE = -1e10;
 
-#include "platform/platform.h"
-#include "platform/gui.h"
-#include "resource.h"
 
 using Platform::AllocTemporary;
 using Platform::FreeAllTemporary;