Delete laser_tool and wlkeyctrl to documentation index for distro

Because of documenting error .I cant create a ros wiki page now.
So ,I will edit them and pull requests again.

By the way, could you give me some suggestions about creating a wiki page? I use catkin_create_pkg to create a package but I can't find any file named manifest.xml,but your tutorials http://www.ros.org/wiki/PackageDocumentation need to ' Put the wiki page link in your manifest.xml file'.

Will you give me some help?
Thank you very much~