Switch random function to std::mt19937

Added class EQEmu::Random
Functions:
EQEmu::Random::Int(int low, int high)
EQEmu::Random::Real(double low, double high)
EQEmu::Random::Roll(int required)
EQEmu::Random::Roll(double required)
EQEmu::Random::Reseed()

For zone, you will access the random object through the zone object
ex.
	zone->random.Int(0, 100);

Int returns a random int between low and high
Real returns a random double between low and high
Roll(int) returns true if Int(0, 99) < required is true
Roll(double) returns true if Real(0.0, 1.0) <= required is true

world/net.cpp

@@ -69,6 +69,7 @@
 
 #include "../common/emu_tcp_server.h"
 #include "../common/patches/patches.h"
+#include "../common/random.h"
 #include "zoneserver.h"
 #include "console.h"
 #include "login_server.h"
@@ -97,6 +98,7 @@ UCSConnection UCSLink;
 QueryServConnection QSLink;
 LauncherList launcher_list;
 AdventureManager adventure_manager;
+EQEmu::Random emu_random;
 volatile bool RunLoops = true;
 uint32 numclients = 0;
 uint32 numzones = 0;