Merge pull request #37 from lemire/release080

preparing new release

Merge pull request #35 from lemire/dlemire/add_windows_arm_checks

Adding ARM checks under Windows.

Cleaning.

Merge pull request #33 from lemire/dlemire/unsafe_mutation

Illustrate issue 32

Merge pull request #29 from imback82/imback82/move_operators

Move constructor / assignment operator

Adding "empty" function.

unset was wrong.

version 0.6.0

Tweaking sizeInBits

Merge branch 'master' of github.com:lemire/EWAHBoolArray