Linting commit

[Antranig Basman]

I've taken the liberty of following my last suggestion and capping our JSHint version at what in npm is 
called ~2.4.0 which will currently pull in version 2.4.4 of jshint - this more or less provides what we need 
in terms of whitespace checking and a reasonably low quantity of bugs.


This was done by setting our grunt-contrib-jshint npm version to ~0.9.0. This will continue to work unless 
either the plugin or jshint release a minor update which backports the whitespace removal. This seems an 
unlikely result - in that case we would probably have no alternative to fork both projects to freeze their 
versions at an appropriate point. npm does include a facility which in theory could help us here by the name 
of "npm shrinkwrap" but from reading the docs it seems to make too many assumptions about the project 
versioning structure to be applicable to our case of just wanting to freeze the version of one dev 
dependency. It is a possible avenue to research though.

This result is not quite ideal since the revision of jshint that we would really want is this one:

https://github.com/jshint/jshint/commit/bf886b8f07124ddfbef158d7269e7b3b184a65fe

This fixes a bug that stops jshint ignore:line from being able to counteract the effect of an unused 
parameter warning. Unfortunately this revision was not assigned a version number (it falls between 2.4.4 and 
2.5.0), and the commits to eliminate whitespace support follow directly afterwards. In order to compensate 
for this, I adjusted the several lines where this ignore was applied to instead include the unused parameter 
in a comment. I also fixed up a case of trailing whitespace that already reappeared in the framework during 
the couple of days we ran with a jshint which didn't detect it :)

These decisions are easily revisited - I thought it best to push this now since this is a change that will 
conflict with any outstanding work and it is best that we push ahead as best we can, especially since Justin 
will be away for the next couple of weeks. Could all those who have outstanding pull requests please now 
update them against master since probably 1 line in 5 of our codebase has been affected by these linting 
changes.

Thanks to Justin for steadfastly and consistently pushing through the long work necessary to get this 
improvement made -

Cheers,
A