Implement crash handling on Linux

This will allow us to generate crash dumps and have users report
crashes.

HandleCrash.h

@@ -0,0 +1,18 @@
+// This is a simple header file for the crash handling system. It exposes only one method,
+// initBlackMagic, which initializes the system, registering signal handlers, or doing
+// whatever stupid things need to be done on Windows.
+// The platform specific implementations for this system are in UnixCrash.cpp and 
+// WinCrash.cpp.
+
+#if defined Q_OS_WIN
+#warning Crash handling is not yet implemented on Windows.
+#elif defined Q_OS_UNIX
+#else
+#warning Crash handling is not supported on this platform.
+#endif
+
+/**
+ * Initializes the crash handling system.
+ */
+void initBlackMagic();
+