Enhancement/flexbox (vuetifyjs#266)

* add .idea to gitignore

* initial html,body,with refactor

* initial work on main layout styles

* add grid order

* further dev on grid styles

* add colum to layout

* additional column css for layout

* add default behaviour for scroll on v-app and v-content

* fix media grid issue in styl

* minor adjustment to column height

* fix firefox issue with content height

* add helper class for safari issue

.gitignore

@@ -2,3 +2,4 @@
 node_modules/
 .vscode/
 npm-debug.log
+.idea/