Merge pull request #3 from Imperiopolis/gh-pages

Expand on function parameter syntax and add type aliasing. Better colors.
Add GitHub banner.
Better fonts.
Live text, responsive GitHub banner.
New favicons.
Default Web clip title.
Lighter shadow.
Encourage use of immutable 'let' for variable declaration
Merge pull request #4 from kristopherjohnson/gh-pages

Encourage use of immutable 'let' for variable declaration
Enable Google Analytics demographics tracking because I am interested to see what it looks like. Never going to put ads on this page.
You have to supply the closure body if you are going to use the let keyword.
Moving explanation of constants to new section, prioritize explanation of typealias