Merge pull request #6 from drpicox/master

Split Gruntfile, css, bbs, into multiple files to ease maintenance.
merge
added cname
add markdown-to-json (m2j) plugin to not replicate speakers data
deactivate from supporters img-responsive so logos are centered
share the same navbar partial between all pages using helpers (fixes navbar in sponsorship)
fix table style
make sponsor table clearer about not included things