Makes "closed" modal URL less gross.
Include Modernizr in style guide template.
Merge pull request #267 from DoSomething/modal-path-tweak

Modal path tweak
Adding in user account link into nav. Temp approach until nav refactoring.
Merge pull request #268 from DoSomething/navigation--user-link

Adding in user account link into nav. Temp approach until nav refactoring
Release v3.9.3