hamster: Patch for launching ferret from within hamster.

Hamster was using 'execv' for launching ferret, which only works if
ferret is in the PWD. Replacing 'execv' with 'exevp' fixes this, as
'execvp' searches the PATH.
ropgadget: Fix style.
Merge branch 'master' of https://github.com/mathias-nyman/blackarch into unstable
blackarch - wnmap added