Add px and py rules to padding rules.

[manuel12]

A px rule is a padding rule that only affects left and right padding(horizontals hence the x) and is written like so:

.px {
  padding-left: auto.
  padding-right auto.
} 

A py rule is a padding rule that only affects top and bottom padding(verticals hence the y) and is written like so:

.py {
  padding-top: auto.
  padding-bottom auto.
}

[hasanrashid]

I'd like to take this on

[manuel12]

Yes of course. Go ahead :)

[manuel12]

@hasanrashid Hello it's been a week. When do you think you can have this? :)

[hasanrashid]

@manuel12 On its way tonight

[manuel12]

Closing as done.