-Added thumbnails for saved vis (yay) #607
-fiddles with some index page formatting.
-Added a loading indication for saved vises.
-Reworked the way file keys are generated. We can now have up to roughly 10^50 different images.
Merge branch 'master' of github.com:isenseDev/rSENSE into mm607
-Fixed minor formatting issue with featured.
Merge branch 'master' of github.com:isenseDev/rSENSE into mm607
Merge pull request #637 from mmcguinn/mm607

Mm607