Remove escaping of underscore (_) in filenames. Should not be necessary.

Author: spier

SUMMARY.md

@@ -11,12 +11,12 @@
   * [Authors and Reviewers](infrastructure/authors.md)
 * [What, When and How to Measure](measuring/measuring.md)
   * [Goals using Metrics](measuring/goals.md)
-    * [Use Goals, Questions, and Metrics](measuring/use\_gqm.md)
-      * [Goals](use\_gqm/goals/README.md)
+    * [Use Goals, Questions, and Metrics](measuring/use_gqm.md)
+      * [Goals](use_gqm/goals/README.md)
         * [Reduce Duplication](measuring/goals/reduce-duplication.md)
-      * [Questions](use\_gqm/questions/README.md)
+      * [Questions](use_gqm/questions/README.md)
         * [Who Uses](measuring/questions/who-uses.md)
-      * [Metrics](use\_gqm/metrics/README.md)
+      * [Metrics](use_gqm/metrics/README.md)
         * [Usage Count](measuring/metrics/usage-count.md)
   * [Areas of Analysis](measuring/areas.md)
   * [Goal-Question-Metric Approach](measuring/gqm.md)