Merge branch 'new-nav-width' into 'master'

nav full width

old
![Screen_Shot_2015-12-21_at_3.47.01_PM](/uploads/ef47c61eb33521087fc40d400d01cba8/Screen_Shot_2015-12-21_at_3.47.01_PM.png)

new
![Screenshot_2015-12-24_12.16.53](/uploads/30cf37886b3710a22daa0b82583975e9/Screenshot_2015-12-24_12.16.53.png)


See merge request !2200

app/assets/stylesheets/pages/projects.scss

@@ -337,6 +337,8 @@ ul.nav.nav-projects-tabs {
 
 .top-area {
   border-bottom: 1px solid #EEE;
+  margin: 0 -16px;
+  padding: 0 $gl-padding;
 
   ul.left-top-menu {
     display: inline-block;