Fix color contrast of social media links. Close #463
Consistent spacing.
Bump the nav over on the right

Initial attempts at placing the 'N' in this spot failed. Moving it over now until the next whack.
Avoid using attribute selectors and :not instead of class selectors

It's easier to read and provides better support to those whom have
implemented the old grid with many extra/other classes.
Use consistent line height and heading formula.

* Add a LESS var for base-line-height.
* Tweak heading formula to prove tighter wrapping for smaller `h*`, but not too spacey for larger `h*`.
Add class to provide strong brand font option.
Provide a simple brand font style.
Don't change the width of nested grid12.
Further scope the first class in BP3.
Merge pull request #516 from smeranda/nav-paddling

Bump the nav over on the left
Merge pull request #519 from smeranda/head-strong

Presentation adjustments for headings, impact text.
Merge pull request #515 from smeranda/contrasting

Adjust color contrast of social media link in header flag
Consistency in function names
Cleaner, subtle tab interface. Close #486.
Begin image testing.
Add styles for interactive image and caption.
Use a more descriptive class name.
Add documentation for file usage.
Add structure and consistency to color variables.

Update to new color palette.
New line for diffs