Adds some error checking around finding important symbols and initializing Manticore/Angr. Adds the ability to save concretized bytes to an output directory. For the time being, I'm going with the approach of the user specifying a output dir, then within that I create directories for each file basename in the tests, and subdirectories for each test name, and in there I put binary test files.

src/lib/DeepState.c

@@ -75,7 +75,7 @@ void DeepState_SymbolizeData(void *begin, void *end) {
   uintptr_t end_addr = (uintptr_t) end;
 
   if (begin_addr > end_addr) {
-    abort();
+    DeepState_Abandon("Invalid data bounds for DeepState_SymbolizeData");
   } else if (begin_addr == end_addr) {
     return;
   } else {