Merge pull request #5 from sa-express-news/master

finalized data structures and routes
navigation is *finally* responsive
added navigation and preliminary styling to details template
fixed navigation for newsapp all-years index
css changed to add space around template bodies to make it easier to scroll up and down the page.
further refined yearindex.html template, adding in code that allows it to pull year from spreadsheet for title, headline
added datatables jquery-javascript library which makes the homicide table for the year-index template page searccable
removes .DS_Store from static dir  on github
messing around with .DS_Store exclusion
finishes merge