cleanup racket stuff now that I'm switching to racket-mode proper
[git-p4: depot-paths = "//usr/ryand/Bin/elisp/": change = 9240]
This advice for find-tag is just causing pain. removing
[git-p4: depot-paths = "//usr/ryand/Bin/elisp/": change = 9241]
remove magit-bisect now that it is built in. added racket-mode and github-browse-file
[git-p4: depot-paths = "//usr/ryand/Bin/elisp/": change = 9242]