Include StandardJS Javascript Style Guide

[quadrophobiac]

A bare bones Javascript style guide has been cribbed from Electron. Has anyone any recommendations on a good JS style guide for use in our contributors guide?

[quadrophobiac]

excellent discussion on this topic in this PR https://github.com/theodi/comma-chameleon/pull/174

[quadrophobiac]

Using @chris48s's response to spec this ticket

• [ ] Add standard js to project requirements

• [ ] Bring existing code into line with guidance:

  • Run standard --fix on codebase to automatically convert as much as possible to to standard js conventions
  • Mop any issues that need manual intervention

• [ ] Remove JsHint config files (.jshintrc, .jshintignore) from root/subdirs + JsHint package

• [ ] Edit Travis config to run Standard Js linter in CI build instead of JsHint

• [ ] add Standard Badge to repo