Initial commit of 18F website structure

Includes bootstrap, jquery, a basic font with
the lightbulb, 18f logo, and github as icons.
Add Raleway and Open Sans fonts

Grab them from the Google CDN.  Raleway for h1-h6,
Open Sans for the document body.
Add a camera icon for the main jumbotron

icon-camera is the class name
Add 18F logo to page
Add emphasis as per the mock up
Make lightbulb act responsive

Fixes for the implementation to more closely match the mock up.
updated images, fonts

added icons, images, and logos to the images folder and changed the 18f
logo
footer and tweaks

added footer and tweaked layout/css
added blog section and stylings
hero background and responsive updates

added responsive background image to hero div, and made many responsive
tweaks
added explicit firefox support for responsive background
changed photo
Tweak jumbotron; use numerical font weights
Reduce fonts used from 8 to 5

Only load the fonts that are actually in use.  This eliminates
loading 3 font files.  If we eliminate the use of Raleway 600,
then we can remove another font too.
Font was too small to read.  It hurt my eyes.
Basic tumblr integration

Added a javascript file for our javascript implementations.

On document.ready(), calls the tumblr api to get our text posts.
Since there's no posts to test with, do nothing for now.
In the future, will render the posts.
streamlined some html and tweaked some css
Fix bootstrap html syntax for blog

All 'row' elements must have 'col' elements inside.
Fix the nesting of the 'col' elements and 'rows',
and remove extraneous css that is not needed once
correct bootstrap syntax is used.
Incremental Tumblr commit

Committing what I have so @quepol can test and look at it.

Still needs to be done:
- keep blog text at a maximum height (snippet using dotdotdot)
- link tags correctly back to tumblr
Add links to Tumblr tags

Also added a variable to set the tumblr blog id.