Add support for .jscsrc files.

IMO both, .jscs.json and .jscsrc, should be supported in the project
directory *and* the home directory :)

It seems like the default priority order for the config files changed in jscs about a month ago:
https://github.com/mdevils/node-jscs/commit/e71f2ead526cb298ea15e5892879c84fda6f312b