3.0.1/3.0.2 releases - ignore binaries in npm publish

Refactor paths for improved CLI experience (#5)

* Refactoring where files get downloaded to

previously for the CLI it's defaulting to process.cwd()
Also major version bump of fs-extra

* Fix trailing comma

update changelog, readme

* Update readme to show appveyor master branch badge

* change functions to default parameters syntax, Update tests, add npmignore

* Update readme and changelog

 further tweak function param default syntax