Updating .gitignore; removing generated file that shouldn't be tracked.

.gitignore

diff --git a/.gitignore b/.gitignore
index 00b41c6..5106459 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,6 @@
 bin/
+*_trace
+# Mac-specific ignores
 .DS_Store
+.Spotlight-V100
+.Trashes