Build a pdf

[Zerotask]

Building a website is great but if you want to share your documentation with customers it's always great to send a simple pdf file instead of a zip with a whole website.

Therefore I suggest an option for the build command to create a pdf instead of a website.

[fabriciomurta]

Hi! Please refer to #84, #85 and #104. They are all related to what you're asking. I am going forward and labeling this as duplicate as it is basically the same of #84. Let us know if you don't agree.