adds new 'variables' scss file.
moves gradient mixin to separate file
moves color variables to variables scss file
splits out all element.scss elements to separate partials
creates varaibles folder and separates colors to own file
adds modernizr and no-js mixins
adds simple helper %placeholders to @extend
fixes codes so it doesn't break
Merge pull request #10 from UCL-WAMS/partialisation

Partialisation