Adds Query.__rand__ and dal.Query.__ror__

Adds __rand__ == __and__ and __ror__ == __or__.

Also strips trailing spaces.
fixed Issue 1456:encoding in mail.send, thanks Corne
Merge pull request #79 from z4y4ts/master

Adds Query.__rand__ and dal.Query.__ror__
fixed gluon/contrib/imageutils.py image path, thanks Tito Garrido