Merge pull request #4 from blairprophett/flexbox

flexbox holy grail layout working, not optimized for mobile, navbar togg...
Merge pull request #5 from blairprophett/flexbox

mobile layout working
Merge pull request #6 from blairprophett/flexbox

more CSS
Merge pull request #7 from blairprophett/flexbox

added email to link to contact page, more CSS
hosting landing photo in app rather than imgur
added controller methods for dogs and parks
added parks index and show with seeded data