Fix for issue #2, standardized naming on EXCLIB_ scheme; moved EXC_STATUS_LIST to EXCLIB_EXCEPTION; added some new demos and gave old demos more sensible names. Various other small improvements.

demo/helpers.c

@@ -0,0 +1,14 @@
+#include "exclib.h"
+
+int main(void)
+{
+  TRY {
+    THROW_ZERO(NULL, EXC_NULLPOINTER, "I just threw with THROW_ZERO");
+  } CATCH ( EXC_NULLPOINTER ) {
+    THROW_NONZERO(strcmp("not", "equal"),
+		  3,
+		  "strcmp was nonzero!");
+  } ETRY;
+
+  return 0;
+}