Bumps support branch to 1.13.10-rc2

Additionally improves .gitignore

Change-Id: I5bebbdced1b0df2a92b244c92d997ef66478ceb5
diff --git a/.gitignore b/.gitignore
index 8bc2e12..13355ca 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,8 @@
 .settings
 *.swp
 *.iml
+*~
+*.class
+.checkstyle
+target
+.idea