Semantic Grid

Removed the grid from the HTML and placed it into the SCSS as Foundation Mixins.
Merge branch 'master' of github.com:ushahidi/pingapp into semantic-grid

Conflicts:
	application/views/pages/login.php
	application/views/pages/person/edit.php
Merge pull request #13 from ushahidi/semantic-grid

Semantic Grid, with fixed merge conflicts