change jshint comment type

the generated markdox was including all of the code from “jshint” to
the end of the login function, we don’t want that. (see also
https://github.com/forio/epicenter/commit/0ea9a18ef57f074065bc911880ab43
62664d8c21)

also, remove extra hyphens in updated account description.
Merge pull request #8 from forio/no-login-code-in-docs

change jshint comment type