Better makefile, restructured, more demos

demo/twolevel.c

@@ -0,0 +1,21 @@
+#include "exclib.h"
+
+/*
+ * What this example shows:
+ * 1- That an exception will propagate up out of the current TRY/CATCH context
+ * 2- That an uncaught exception will generate an error
+ */
+
+int main(void)
+{
+  TRY {
+    THROW(3, NULL);
+  } CATCH(3) {
+    THROW(3, NULL);
+  } ETRY;
+
+  EXCLIB_TRACE("Should never get here");
+
+  return 0;
+
+}