Update resources.html

Added ghostlab app to device testing resources.
Added Responsive Design Workflow
Added A Matter of Workflow
added fitgrd to Grid Tools
Added CircleType.js to Typography/Lettering
Merge pull request #44 from jayalai/patch-1

added fitgrd to Grid Tools
Merge pull request #45 from peterhry/patch-1

Added CircleType.js to Typography/Lettering
Merge pull request #43 from andiio/gh-pages

Added link to New testing tool
added http://blog.cloudfour.com/8-guidelines-and-1-rule-for-responsive-images/
Adding a link to unsemantic.com
Merge pull request #46 from nathansmith/patch-1

Adding a link to unsemantic.com
Update resources.html

I've added this line:
 
<li><a href="http://www.justinmind.com">Justinmind Prototyping Platform</a></li>
 
inside the "Post-PSD tools" section.  

I think this is the best fit for our Responsive Prototyping Platform: http://jimp.co/JustinmindPrototyper 

Thank you Brad!

  Cheers,

  Xavi.
Merge pull request #47 from xrportet/patch-1

Update resources.html
Added Profound grid
Adding Responsive Images for Ruby on Rails

It's both client and server side but wasn't sure where you wanted it so I added it next to the other server-side solutions.
Merge pull request #48 from johnkoht/patch-1

Adding Responsive Images for Ruby on Rails
Replace 320 and Up for Rock Hammer

320 and Up was replaced by Rock Hammer and is no longer being developed
Fixing Broken Link

Under "calculators" the link to "fluid grids" was broken.
Added Clown Car Technique
Added Why We Need Responsive Images