Minor clean up

* Avoid using NULL, FALSE etc., use literals instead
* Fix JSDuck warning:
  Warning: ext.guidedTour.lib.js:350: Optional param followed by regular param allowAutomaticOkay
* Fix Git warning:
  Untracked files: docs/
  .jshintignore \ No newline at end of file
* Fix MediaWiki style violation:
  No space between function name and parameter list
  "isset ( params )" -> "isset( params )
* Update .jshintrc to match common/local pattern.
  No effective changes were made, merely re-ordered to split
  local overrides from the ones commonly used in all MediaWiki
  projects.

Change-Id: I35b5c10366b432fc75f42fc43e83c487cbbf6e52
Merge "Minor clean up"