New unit system <boost/units/systems/information.hpp>
Defines base units and system units for: bit, byte, nat, hartley and shannon,
and scale units for binary prefixes kibi, mebi, gibi, tebi, pebi, exbi.
[boost] [units] Added zebi and yobi IEC prefixes and corresponding tests.
Add IEC 80000-13:2008 binary prefixes and test their formatting with boost::units::binary_prefix.
Add IEC 80000-13:2008 binary prefixes and test their formatting with boost::units::binary_prefix.

Signed-off-by: Marek Kurdej <mkurdej@users.noreply.github.com>
Merge branch 'fix/units_systems_information' of https://github.com/MarekKurdej/units into fix/units_systems_information
Cosmetic change.
Merge pull request #12 from mkurdej/fix/units-systems-information

Add information system units (bit, nat, ...)