Merge pull request verilog-to-routing#714 from CAS-Atlantic/signed_numbers

ODIN II: restructured string caches; mass leak fix

Author: jeanlego

ODIN_II/.gitignore

@@ -1,7 +1,15 @@
-regression_test/runs
-OUTPUT/*
-temp
+regression_test/run*
 regression_test/latest
-*_preproc.v
-default_out.blif
-*.dot
+
+temp
+*.v
+*.blif
+*.dot
+*.do
+*.xml
+*_input
+*_output
+*_vectors
+*_activity
+
+!regression_test/benchmark