Command measurement refactoring + fixes from #27

[neusdan]

Includes fixes from @mtahmed and therefore closes/integrates #27

prevents a buffer overlow if the command to measure is greater than 1024 byte in length

@caschulz88 would you have a look?

Fixes #25

[caschulz88]

Looks pretty good and should also prevent from having the buffer overflow there! Great work ;) Will merge now.

[caschulz88]

Haha and don't forget it's Christmas tomorrow so don't work too hard :stuck_out_tongue:

[neusdan]

Thanks.

Just one more fix :-) But the same applies to you!