testing with a new logo
new logo, bootstrap 3.0 upgrade, new about page for bootstrap 3, fixed wording and grammar for about page, fixed prelaunch info column.
new Gemfile.lock
add new icon
enhanced user model to use devise authentication
center the box on front page
merged with bootstrap mobile first layout from Victor
fixed subsribe bar, fix spacing under the black box, fix alert bar size
Merge branch 'filling_in_layout' of https://github.com/vsutan/lightgraphos into vsutan-filling_in_layout
swtich model to visitor, layout is fixed from Victor: fixed subsribe bar, fix spacing under the black box, fix alert bar size