barclays US doesn't have 2FA
correct URL for Barclays US
Barclays twitter handle
move Barclays into Banking
Move nav to _includes/ folder

Allows for:
- Using 'active' class from SemanticUI.
- Easy updating of nav elements.
Thanks EngineYard for 2FA
Merge pull request #527 from ilyakatz/engineyard

Thanks EngineYard for 2FA
Merge branch '524', closes #524
Merge branch 'master' into gh-pages

Conflicts:
	index.html