Remove global "using namespace std;" declarations, use "std::" prefixes on all std elements

Fix whitespace changes

src/SampleHistory.h

@@ -11,7 +11,7 @@ public:
 private:
 	float GetSampleNum( float fSamplesAgo ) const;
 
-	vector<float> m_afHistory;
+	std::vector<float> m_afHistory;
 	int m_iLastHistory;
 	int m_iHistorySamplesPerSecond;
 	float m_fHistorySeconds;