Many changes:

- appends "_" to internal macro names (by Markus Heule).
- makes Google Test work with newer versions of tools on Symbian and Windows CE (by Mika Raento).
- adds the (ASSERT|EXPECT)_NO_FATAL_FAILURE macros (by Markus Heule).
- changes EXPECT_(NON|)FATAL_FAILURE to catch failures in the current thread only (by Markus Heule).
- adds the EXPECT_(NON|)FATAL_FAILURE_ON_ALL_THREADS macros (by Markus Heule).
- adds GTEST_HAS_PTHREAD and GTEST_IS_THREADSAFE to indicate the availability of <pthread.h> and Google Test's thread-safety (by Zhanyong Wan).
- adds scons/SConscript for building with scons (by Joi Sigurdsson).
- adds src/gtest-all.cc for building Google Test from a single file (by Markus Heule).
- updates the xcode project to include new tests (by Preston Jackson).

include/gtest/gtest-message.h

@@ -102,7 +102,7 @@ class Message {
   }
 
   ~Message() { delete ss_; }
-#ifdef __SYMBIAN32__
+#ifdef GTEST_OS_SYMBIAN
   // Streams a value (either a pointer or not) to this object.
   template <typename T>
   inline Message& operator <<(const T& value) {
@@ -139,7 +139,7 @@ class Message {
     }
     return *this;
   }
-#endif  // __SYMBIAN32__
+#endif  // GTEST_OS_SYMBIAN
 
   // Since the basic IO manipulators are overloaded for both narrow
   // and wide streams, we have to provide this specialized definition
@@ -187,7 +187,7 @@ class Message {
   }
 
  private:
-#ifdef __SYMBIAN32__
+#ifdef GTEST_OS_SYMBIAN
   // These are needed as the Nokia Symbian Compiler cannot decide between
   // const T& and const T* in a function template. The Nokia compiler _can_
   // decide between class template specializations for T and T*, so a
@@ -204,7 +204,7 @@ class Message {
   inline void StreamHelper(internal::false_type dummy, const T& value) {
     ::GTestStreamToHelper(ss_, value);
   }
-#endif  // __SYMBIAN32__
+#endif  // GTEST_OS_SYMBIAN
 
   // We'll hold the text streamed to this object here.
   internal::StrStream* const ss_;