Support for .jscsrc files

Priority order is -c value, .jscsrc, .jscs.json
Also includes tests for new functionality

Fixes #196
Remote old support for passing in different CWD

Not needed now that the tests go against the cli-config module directly.
Remove named function expression
cli-config module now returns config objects

- Broke cli-config into multiple methods
- Tests for all cli-config methods
- Updates to CLI module to use new functionality
- Update CLI tests to exercise changes to module
- Added mocha BDD "afterEach" method to JSHint predefs