syntax: regexp
.*/build/.*
^bullet/lib
^bullet/include
.*\.so
.*~
.*src/.*/msg/_.*
.*src/.*/srv/_.*
.*/msg_gen/.*
.*/srv_gen/.*
.*/msg/lisp/.*
.*/srv/lisp/.*
.*/bin/.*
^build
^kdl/include
^eigen/include
^eigen3/include
.*\.pyc