Upgrade to python-gnupg 0.3.7.
Upgrade to python-gnupg 0.3.7.

* Dropped support for Python versions earlier than 2.6.
* Added a number of tests and CI via Travis.
* Fixed a few bugs.
* Largely improved documentation.

bglassy/OpenBazaar,matiasbastos/OpenBazaar,mirrax/OpenBazaar,saltduck/OpenBazaar,matiasbastos/OpenBazaar,dionyziz/OpenBazaar,NolanZhao/OpenBazaar,NolanZhao/OpenBazaar,akhavr/OpenBazaar,im0rtel/OpenBazaar,im0rtel/OpenBazaar,Renelvon/OpenBazaar,bglassy/OpenBazaar,dionyziz/OpenBazaar,dionyziz/OpenBazaar,habibmasuro/OpenBazaar,saltduck/OpenBazaar,must-/OpenBazaar,blakejakopovic/OpenBazaar,tortxof/OpenBazaar,blakejakopovic/OpenBazaar,saltduck/OpenBazaar,bankonme/OpenBazaar,akhavr/OpenBazaar,saltduck/OpenBazaar,rllola/OpenBazaar,matiasbastos/OpenBazaar,bglassy/OpenBazaar,bankonme/OpenBazaar,freebazaar/FreeBazaar,must-/OpenBazaar,mirrax/OpenBazaar,freebazaar/FreeBazaar,matiasbastos/OpenBazaar,freebazaar/FreeBazaar,blakejakopovic/OpenBazaar,atsuyim/OpenBazaar,atsuyim/OpenBazaar,akhavr/OpenBazaar,rllola/OpenBazaar,tortxof/OpenBazaar,akhavr/OpenBazaar,habibmasuro/OpenBazaar,NolanZhao/OpenBazaar,im0rtel/OpenBazaar,NolanZhao/OpenBazaar,atsuyim/OpenBazaar,im0rtel/OpenBazaar,atsuyim/OpenBazaar,freebazaar/FreeBazaar,Renelvon/OpenBazaar,tortxof/OpenBazaar,mirrax/OpenBazaar,dionyziz/OpenBazaar,must-/OpenBazaar,tortxof/OpenBazaar,must-/OpenBazaar,bglassy/OpenBazaar,freebazaar/FreeBazaar,blakejakopovic/OpenBazaar,bankonme/OpenBazaar,Renelvon/OpenBazaar,bankonme/OpenBazaar,habibmasuro/OpenBazaar,dionyziz/OpenBazaar,rllola/OpenBazaar,Renelvon/OpenBazaar,habibmasuro/OpenBazaar,rllola/OpenBazaar,mirrax/OpenBazaar,akhavr/OpenBazaar