doc: there is no libboost-base-dev, add missing sudo
- There is no libboost-base-dev, no idea how I ended up with this
- Without that, installing separate boost packages works fine on both Ubuntu 14.04 and Debian 7 (tested on VMs), this did not use to be the case, AFAIK.
- Add a missing 'sudo' for consistency
- Need bsdmainutils for hexdump (for the tests)