Format for mobile phone

[jgadsden]

Describe what change you would like :
It would be good if the site was more accessible on a mobile phone, especiallyas this is a documentation project

Some feedback on the Developer Guide
Reading on the website is pretty tedious, especially on a mobile phone. That's a general issue, though. Tables for example always look terrible.

Context :
Section: all

migrated from previous repo issue: 'Format for mobile phone' #312