Add more flesh to parts about GET and POST in php data forms chapter
Change title of php data forms chapter to make it easier to understand, but then add a paragraph explaining how the title is actually more specific the the subject matter of the chapter :)
Write more about the differences between POST and GET in the php data forms chapter
Write a whole bunch of stuff more about the hows and whys of how to use request data in php, into the php data form chapter
Add some more flesh to the part about constructing our own GET request with querystring parameters
Merging 'master' into 'gh-pages'