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By adding 15px of left and right `padding` on `.navbar-collapse` the conditions in which the page was originally made are replicated.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.