Basic precompiled header support for Linux/OS X. Shaves 20-30% off full rebuild time on my system.

Source/pch.h

@@ -0,0 +1,55 @@
+#include "Common.h"
+#include <algorithm>
+#include <array>
+#include <assert.h>
+#include <bitset>
+#include <cassert>
+#include <cctype>
+#include <cerrno>
+#include <cmath>
+#include <cstdarg>
+#include <cstddef>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <ctime>
+#include <ctype.h>
+#include <deque>
+#include <errno.h>
+#include <execinfo.h>
+#include <fcntl.h>
+#include <float.h>
+#include <fstream>
+#include <functional>
+#include <getopt.h>
+#include <iomanip>
+#include <iostream>
+#include <limits.h>
+#include <limits>
+#include <list>
+#include <locale.h>
+#include <map>
+#include <math.h>
+#include <memory.h>
+#include <memory>
+#include <mutex>
+#include <numeric>
+#include <pthread.h>
+#include <queue>
+#include <set>
+#include <sstream>
+#include <stack>
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <thread>
+#include <time.h>
+#include <type_traits>
+#include <unistd.h>
+#include <unordered_map>
+#include <unordered_set>
+#include <utility>
+#include <vector>