removed guard from gemfile to simplify and encourage development with node/gruntjs
added .node/ruby-version files and update .gitignore
added Magnific-Popup modals component, removed depricated gw modals and popovers components
added magnific popup as integrated component
removed width 100% from magnific popup
adjusted opacity of modal overlay bg
Update README.md

added link to "Contributing to Groundwork" wiki page
Update README.md
Update README.md
added stacktable to gruntfile, added source files for cycle2, icheck, magnific-popup and stacktable modules
added pink and turquoise to tooltips modifier colors
Merge branch 'master' of github.com-gary:groundworkcss/groundwork
added transform: translateZ(0); to filter-shadow mixin to support retina screens
added filter: drop-shadow to navigation drop menus (now supporting retina screens)
added shadow to dropdown buttons
added width 100% to pagination links
enforced zero margin reset on dropdown button seperators
updated css
enforced zero margin reset on dropdown button seperators
updated tooltip color inheritance