Addressed issues found by Google code lint.

Fixed:
 - Removed trailing whitespace.
 - Removed out of date TODO's.
 - Added #include<algorithm> to DataManager.cpp
 - Reordered includes to include C system headers before C++ system headers.
 - Added username to TODO's
 - Renamed include guards to use full project name as prefix.
 - Made methods and parameters const where possible.
 - Made UDPSocket constructor explicit.

Won't Fix:
 - snprintf is introduced in C++11.
 - Trailing comments at the end of namespace & header guards
 - Did not re-inlude headers already included by the matching XPC header.
 - localtime is fine since X-Plane is not multithreaded at all on the plugin side.
 - Linter confuses #elif with parens as a function call.
 - namespace indentation

xpcPlugin/DataManager.cpp

@@ -20,6 +20,7 @@
 #include "XPLMDataAccess.h"
 #include "XPLMGraphics.h"
 
+#include <algorithm>
 #include <cmath>
 #include <cstdio>
 #include <map>
@@ -516,7 +517,7 @@ namespace XPC
 		drefSize = min(drefSize, size);
 		XPLMSetDatavf(xdref, values, 0, drefSize);
 	}
-	
+
 	void DataManager::Set(DREF dref, int values[], int size, char aircraft)
 	{
 		const XPLMDataRef& xdref = aircraft == 0 ? drefs[dref] : mdrefs[aircraft][dref];
@@ -738,7 +739,6 @@ namespace XPC
 		Set(DREF_LocalY, local[1], aircraft);
 		Set(DREF_LocalZ, local[2], aircraft);
 		// If the sim is unpaused, this will override the above settings.
-		// TODO: Are these setable when paused? Are these necessary?
 		Set(DREF_Latitude, (double)pos[0], aircraft);
 		Set(DREF_Longitude, (double)pos[1], aircraft);
 		Set(DREF_Elevation, (double)pos[2], aircraft);