host cgminer 3.7.2, update index and mining content
updated page title and nav title to 'Dogecoin Tutorial'
Merge pull request #14 from mkeung/master

update layout, wallet windows content
increased size of directional text on bottom of page
fixed 'discreet' and removed mac wallet backup note
updated 'learn more' panels
updated panel heading font color
Updated nav with bottom border; added rocket icon to logo
update menu styling, add links