Merge pull request #2001 from wmarquardt/codeigniter3update

Codeigniter 3 support

CodeIgniter.gitignore

@@ -9,3 +9,9 @@ user_guide_src/build/*
 user_guide_src/cilexer/build/*
 user_guide_src/cilexer/dist/*
 user_guide_src/cilexer/pycilexer.egg-info/*
+
+#codeigniter 3
+application/logs/*
+!application/logs/index.html
+!application/logs/.htaccess
+/vendor/