fix(tryCatch): make it possible to exit with a non-zero status code (fixes #50)

Author: niieani

example/exitcode.sh

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+
+source "$( cd "${BASH_SOURCE[0]%/*}" && pwd )/../lib/oo-bootstrap.sh"
+
+import util/exception util/tryCatch util/log util/test
+
+exit 1

lib/util/tryCatch.sh

@@ -14,8 +14,9 @@ Exception::SetupTemp() {
 }
 
 Exception::CleanUp() {
+  local exitVal=$?
   rm -f $__oo__storedExceptionLineFile $__oo__storedExceptionSourceFile $__oo__storedExceptionBacktraceFile $__oo__storedExceptionFile || exit 1
-  exit 0
+  exit $exitVal
 }
 
 Exception::ResetStore() {