Adding skin CSS an JS content: bluegray

Bluegray is a skin forked from SB Admin 2,
a Bootstrap starter template by
Iron Summit Media Strategies.

http://startbootstrap.com/sb-admin-v2

This ncludes jQuery, bootstrap, DataTables, FontAwesome.
Fixing SQL query to get workspaces an user has access to
[Design] Error 404 custom page

Uses Foundation and not Bootstrap, quicker to get Open Sans and
the wanted typography rhythm.
[Design] Logout link is now lowercase
[Design] Improving error pages CSS

Attaching mountain background at bottom right, instead of bottom left.
[Design] First draft of the new 2014 design.

Improving header/footer/help controllers.