Move everything from global namespace to "sp" namespace

When writing the X11 (linux) implementation there was a problem with X11 defining a "Display" type and we also have a Display class in the engine.

So to fix that problem and minimize the risk for running into other name conflicts. We move everything from global namespace.

source/Math/Color.cpp

@@ -1,6 +1,8 @@
 
 #include <Spectre/Math/Color.h>
 
+namespace sp {
+
 const Color Color::Black	(0  , 0  , 0  , 255);
 const Color Color::White	(255, 255, 255, 255);
 const Color Color::Red		(255, 0  , 0  , 255);
@@ -126,3 +128,5 @@ Color operator *(const Color& c, unsigned int s)
 {
 	return Color(c.r * s, c.g * s, c.b * s, c.a * s);
 }
+
+} // namespace sp

source/Math/Logarithm.cpp

@@ -3,18 +3,18 @@
 #include <cstdlib>
 #include <Spectre/Math/Math.h>
 
-namespace math {
+namespace sp {
 
-	#define	LOG2INBASE10 0.30102999566f
+#define	LOG2INBASE10 0.30102999566f
 
-	double log(double base, double value) {
+double math::log(double base, double value) {
 
-		return log10(value) / log10(base);
-	}
+	return ::log10(value) / ::log10(base);
+}
 
-	double log2(double value) {
+double math::log2(double value) {
 
-		return log10(value) / LOG2INBASE10;
-	}
+	return ::log10(value) / LOG2INBASE10;
+}
 
-}; // namespace math
+} // namespace sp

source/Math/Math.cpp

@@ -2,8 +2,8 @@
 #include <cstdlib>
 #include <Spectre/Math/Math.h>
 
-namespace math {
-
+namespace sp { namespace math
+{
 	float rand(float min, float max) {
 
 		float r = ((float) ::rand()) / RAND_MAX;
@@ -50,8 +50,8 @@ namespace math {
 	Matrix4f rotation(float theta) {
 
 		float r = deg2rad(theta);
-		float s = std::sin(r);
-		float c = std::cos(r);
+		float s = ::std::sin(r);
+		float c = ::std::cos(r);
 
 		return Matrix4f(
 			   c,   -s, 0.0f, 0.0f,
@@ -94,4 +94,5 @@ namespace math {
 
 		return Vector3f(matrix.e[8], matrix.e[9], matrix.e[10]);
 	}
-};
+
+} } // namespace sp::math

source/Math/Transform.cpp

@@ -2,6 +2,8 @@
 #include <Spectre/Math/Math.h>
 #include <Spectre/Math/Transform.h>
 
+namespace sp {
+
 Transform::Transform() :
 m_matrix	(Matrix4f::Identity)
 {
@@ -155,4 +157,6 @@ Transform& operator*=(Transform& a, const Transform& other)
 Vector2f operator*(const Transform& transform, const Vector2f& vec) 
 {
 	return transform.transformPoint(vec);
-}
+}
+
+} // namespace sp