butility works in 3
Now butility works on 2 as well.

unicode literals everywhere ... have to adjust standard headers to assure that
bqc works in 2.7 (3 still needs bapp, bkvstore)
bproperties work everywhere
Added plenty of Path testcode
Path finally seems to work on py3 as well.

Found a real bug on the way, probably there are more especially when related
to unicode handline.

However, as the Path type already has the notion of bytes and strings,
I suppose the bugs will not be happening there at least.
And transactinos work as well now