Rename main.css to html5.css - keeping author styles separate

Signed-off-by: Cole Peters <cole@colepeters.com>
Add Typekit script, update CSS links

Signed-off-by: Cole Peters <cole@colepeters.com>
Add a function to change text colour of input to colour being typed

Signed-off-by: Cole Peters <cole@colepeters.com>
Make initial author styles - typography, i/o elements

Signed-off-by: Cole Peters <cole@colepeters.com>
Update doc title and convert button copy

Signed-off-by: Cole Peters <cole@colepeters.com>