Fixed box not clearing 12 column floats on 3.0.3

Bootstrap 3.0.3 reintroduced floating on all 12th column grid tiers
Fixes IronSummitMedia/startbootstrap#27 by adjusting padding.
By adding 15px of left and right `padding` on `.navbar-collapse` the conditions in which the page was originally made are replicated.
Though this may cause other issues, I have not been able to find any.
Merge pull request #28 from alexstuckey/master

Fixes IronSummitMedia/startbootstrap#27 by adjusting padding.
Merge pull request #26 from Lavoaster/hotfix/bootstrap-3.0.3

Business Casual - Fixed box not clearing 12 column floats on 3.0.3
Minor bug fixes and menu additions.

Fixed some minor bugs and added some items to the menu.
Added 'Landing Page' Template

'Landing Page' has been added to the Start Bootstrap template library.
Fixed padding issue with 'Landing Page' buttons.