GTFO updates.

Swapped gtfo1 and gtfo2 around.

* Expanded gtfo2 (formerly 1) to use multiple variants.
* Added gtfo3, the same as 2 except with "right now" imperative.
* Added gtfo4, the same as 2 except with "right fucking now" imperative.
Expansion of gtfo2, gtfo3 and gtfo4.
Fixed prepend.
More GTFO expansion.
Merge pull request #50 from Hasimir/master

GTFO updates