.jshintrc Support

[whitlockjc]

JSHint supports using a file to hold your configuration. Whenever the jshint executable is invoked, you can either use the --config flag to point to the .jshintrc file or you can let jshint locate your .jshintrc file(s) based on the CWD where the executable was invoked. This is documented in the Configuration section of the JSHint Documentation. The idea would either be to fix where jshint is executed from so that jshint can work as it would from the CLI or we can update the :lt.plugins.jshint/jshint-options to allow for a workspace path or fully qualified path. Thoughts?

Typically I'd submit a pull request but I've not filed the paperwork to contribute and I'm not up to speed on ClojureScript just yet. I'll see if I can expedite these things if necessary.