Codeigniter 3 support

CodeIgniter.gitignore

@@ -4,3 +4,12 @@
 */cache/*
 !*/cache/index.html
 !*/cache/.htaccess
+
+#codeigniter 3
+application/cache/*
+!application/cache/index.html
+!application/cache/.htaccess
+application/logs/*
+!application/logs/index.html
+!application/logs/.htaccess
+/vendor/