Adding roots.io base wordpress theme

See http://roots.io/
Initial customizations of roots theme
Updated css transitions for search input
Updating CSS and base data for search input marquee
Reworking the header to match mockup
Theme logic for placement and style of search box
Header css/layout updates
refining header nav css/layout
Restructuring header for new layout
More layout updates
Stubbing in structure for frontpage
Initialize extra features and add footer
Making the frontpage intro come from wordpress content

This uses content from whatever is designated as the front page in
wordpress
Add frontpage h1 within post body instead of as title

This makes it easier to identify the frontpage for admins in wordpress
Rename image post format to data
Set category page and pagination
make category template to get details from wordpress
First pass at implementing topic icons
Updated form field labels with associated ids for accessibility
Refactored header layout for search on the top