Made site look better on mobile-ish devices, also now responsive.
Removed dead file.
Tweak CSS to space form out a bit.
Space form out nicely and prevent wrapping.
Moved to better naming convention for tutorial stuff.
Removed moved files.
Don't send header in CLI to make debugging easier.
Removed non-existant filter type.
Removed non-existent sentinel filter.
Fixed bad name for URL.
Moved global vars into a place that are used by all files. Fixed incorrect cache filename being tested for existing, which made image always be generated.